Chance Cubes in FTB Skies 2: Aero
FTB Skies 2: Aero 1.13.0 ships version 1.21.1-5.0.2.517 · First seen in 1.0.3
Chance Cubes is a mod in FTB Skies 2: Aero 1.13.0, where it is version 1.21.1-5.0.2.517. Open these mystical blocks to obtain random rewards. Some rewards are helpful while others can be devastating. From hordes of zombies and death traps, to rewards that build full houses and provide next level items, you never know what you'll get! (Summary from the mod's Modrinth page.)
Chance Cubes guide for FTB Skies 2: Aero
Last verified for FTB Skies 2: Aero v1.10.0 on Oct 13, 2026 · text last changed Oct 11, 2026
This is the newest guide. It hasn't been checked against 1.13.0 yet.
Also applies to:FTB Skies 2 1.0.1 to 1.24.0
- Sections
- 6
- Recipes shown
- 6
- Items named
- 6
4 sections are written for this pack; 2 are shared from another pack's guide.
Every recipe and number here was checked against FTB Skies 2: Aero 1.10.0, read from the running game on Sep 22, 2026.
What is Chance Cubes?
2 parts
Same as in the FTB Skies 2 1.22.0 guide
Chance Cubes adds mystical blocks that give you a random reward when you open them. It's a Lucky Block alternative, so you never know what you'll get.[1]
Some rewards are helpful and others can be devastating. They range from hordes of zombies and death traps to rewards that build full houses and hand out next-level items. Each reward has its own twist to keep it interesting.[1]
Who it's for
This mod is for you if you like a bit of risk and surprise in your run. You can find the blocks while exploring, or craft them yourself if you'd rather not go looking. Just be ready for the bad outcomes as well as the good ones.[1]
In this pack
The pack includes Chance Cubes version 1.21.1-5.0.2.517, and it was already present in this pack version or an earlier one.[2]
The mod can load custom rewards from an easy-to-read JSON file format, which is why modpack makers can add their own. Whether this pack adds any custom rewards isn't confirmed by the sources.[1]
Unverified The sources don't say where Chance Cubes fits in the pack's progression, and the mod isn't on the ATM Star path. No pack quests are known to involve it, and the in-pack crafting recipe hasn't been confirmed.
How do you get started with Chance Cubes?
4 parts
Chance Cubes are blocks you open for a random reward. Some rewards are helpful and others can be devastating, so every cube is a gamble. Here is the order I'd make things in this pack.[1]
In this pack the config turns off cube generation in the world: [[config:config/chancecubes/chancecubes-server.toml#General Settings.GenerateOnSurface]], [[config:config/chancecubes/chancecubes-server.toml#General Settings.GenerateAsOre]] and [[config:config/chancecubes/chancecubes-server.toml#General Settings.ChestLoot]] are all false. [[config:config/chancecubes/chancecubes-server.toml#General Settings.SurfaceGenerationAmount]] is set to 0 (the mod default is 100). So plan on crafting your cubes.[3]
Step 1: the Chance Cube
Start with the Chance Cube itself. The pack changes this recipe, so go by the one below and not by what you remember from other packs.[4]
Crafting Shaped
Recipe id: chancecubes:chance_cube_crafting
Step 2: the Tier 1 Chance Pendant
Next comes the Tier 1 Chance Pendant. It is the base of the pendant line, and the scanner, the Tier 2 pendant and the Silk Touch pendant all build on it. A pendant has a limited number of uses, set by [[config:config/chancecubes/chancecubes-server.toml#General Settings.PendantUses]], which is 32 here (the same as the mod default).[3][4]
Crafting Shaped
Recipe id: chancecubes:tier_1_pendant_crafting
This recipe is changed by the pack.
Step 3: the scanner
The Chance Cube Scanner is the next thing to craft, and it uses the Tier 1 pendant you just made.[4]
Crafting Shaped
| any cheap glass blocks | ||
| any cheap glass blocks | any cheap glass blocks | |
| any cheap glass blocks |
Recipe id: chancecubes:cube_scanner_crafting
This recipe is changed by the pack.
Step 4: upgrades
Once you have a Tier 1 pendant, you can upgrade it to the Tier 2 Chance Pendant, and then to the Tier 3 Chance Pendant. There is also a side branch, the Silk Touch Chance Pendant. All of these recipes are changed by the pack.[4]
Crafting Shaped
Recipe id: chancecubes:tier_2_pendant_crafting
Crafting Shaped
Recipe id: chancecubes:tier_3_pendant_crafting
Crafting Shaped
| any string | any string | |
| any string | any string | |
| any string | any string |
Recipe id: chancecubes:silk_pendant_crafting
The pack also switches off some rewards in its reward file. These are all set to false:[5]
How does Chance Cubes work?
5 parts
Chance Cubes is a Lucky Block style mod: you open a Chance Cube and get a random reward. Some rewards are helpful and some are devastating. This section is about how cubes, pendants and rewards work in this pack, not about machines or power. The mechanics worth knowing are how chance values work, how crafting and pendants work, and how rewards are switched on and off.[1]
How chance values work
Each reward has a chance value, and a cube picks from a range of values around its own. In this pack [[config:config/chancecubes/chancecubes-server.toml#General Settings.ChanceRangeMin]] and [[config:config/chancecubes/chancecubes-server.toml#General Settings.ChanceRangeMax]] are both 10, the same as the mod default. Following the example in the config comments, a cube with a chance value of 0 can get rewards from -10 to 10.[3]
If you'd rather ignore chance values completely, [[config:config/chancecubes/chancecubes-server.toml#General Settings.RewardsEqualChance]] gives every reward an equal chance. It is false in this pack, so chance values apply. The D20 setting [[config:config/chancecubes/chancecubes-server.toml#General Settings.D20UseNormalChanceValues]] is also false, which means D20s only have a chance value of either -100 or 100.[3]
Some rewards drop blocks from above. [[config:config/chancecubes/chancecubes-server.toml#General Settings.FallingBlockDropHeight]] sets how many blocks above the cube they fall from, and it is 20 here, the mod default.[3]
Crafting cubes and pendants
The mod's own description says you sacrifice lapis to craft cubes, and the pack has changed this recipe.[1][4]
Crafting Shaped
Recipe id: chancecubes:chance_cube_crafting
This recipe is changed by the pack.
Pendants are crafted in tiers. The Tier 1 Chance Pendant is the starting point, and the Tier 2 Chance Pendant and Tier 3 Chance Pendant build on the tier before. The Chance Cube Scanner and the Silk Touch Chance Pendant also start from a Tier 1 pendant. All of these recipes are changed by the pack, so check the recipes below rather than relying on the mod's defaults.[4]
Crafting Shaped
Recipe id: chancecubes:tier_1_pendant_crafting
Crafting Shaped
Recipe id: chancecubes:tier_2_pendant_crafting
Crafting Shaped
Recipe id: chancecubes:tier_3_pendant_crafting
Crafting Shaped
| any string | any string | |
| any string | any string | |
| any string | any string |
Recipe id: chancecubes:silk_pendant_crafting
Crafting Shaped
| any cheap glass blocks | ||
| any cheap glass blocks | any cheap glass blocks | |
| any cheap glass blocks |
Recipe id: chancecubes:cube_scanner_crafting
[[config:config/chancecubes/chancecubes-server.toml#General Settings.PendantUses]] sets the number of uses for a pendant. It is 32 in this pack, which matches the mod default.[3]
Where cubes come from
In this pack the config has natural generation switched off: [[config:config/chancecubes/chancecubes-server.toml#General Settings.GenerateAsOre]], [[config:config/chancecubes/chancecubes-server.toml#General Settings.GenerateOnSurface]] and [[config:config/chancecubes/chancecubes-server.toml#General Settings.ChestLoot]] are all false. The pack also changed [[config:config/chancecubes/chancecubes-server.toml#General Settings.SurfaceGenerationAmount]] from the mod default of 100 to 0. That leaves crafting with lapis as the route to cubes.[1][3]
Controlling rewards
[[config:config/chancecubes/chancecubes-server.toml#General Settings.EnableDefaultRewards]] is true, so the default reward set is loaded. Each reward then has its own on/off entry in global_rewards.json, which is meant for enabling and disabling rewards for all users.[3][5]
In this pack's file, a handful of rewards are set to false: rewards.chancecubes:boss_demonic_blaze, rewards.chancecubes:boss_evil_witch, rewards.chancecubes:boss_mimic, rewards.chancecubes:boss_ravager, rewards.chancecubes:clear_inventory, rewards.chancecubes:coal_to_diamonds, rewards.chancecubes:diamond_block, rewards.chancecubes:giant_chance_cube, rewards.chancecubes:inventory_bomb, rewards.chancecubes:ores_galore and rewards.chancecubes:redstone_diamond.[5]
Separately, [[config:config/chancecubes/chancecubes-server.toml#General Settings.DisableGiantCC]] is false, so Giant Chance Cubes are not disabled by that setting.[3]
Pack makers and addon authors can add their own rewards, because the mod uses an easy to read JSON file format for custom rewards.[1]
Online checks and holiday rewards
[[config:config/chancecubes/chancecubes-server.toml#General Settings.GloballyDisabledRewards]] is true in this pack. That means the mod checks a web server for rewards that are usually bugged or not working correctly, and it sends the Chance Cubes version to do so. [[config:config/chancecubes/chancecubes-server.toml#General Settings.HolidayRewards]] and [[config:config/chancecubes/chancecubes-server.toml#General Settings.UserSpecificRewards]] are also true. The mod page says the version reporting can be turned off by setting the holiday and user-specific options to false.[1][3]
How do you progress through Chance Cubes?
4 parts
The progression for Chance Cubes in this pack is simple: craft the cube, then climb the pendant tiers. Every recipe for this mod is changed by the pack, so don't rely on what you remember from the mod's default recipes. The ones shown below are the exact in-pack versions.[4]
Step 1: the Chance Cube
Everything starts with the Chance Cube. This is the pack's recipe for it:[4]
Crafting Shaped
Recipe id: chancecubes:chance_cube_crafting
Step 2: the Tier 1 pendant
The Tier 1 Chance Pendant is the base of the whole pendant line. Every other pendant and the scanner in this pack is built from it, so it is the first thing to make after your cubes.[4]
Crafting Shaped
Recipe id: chancecubes:tier_1_pendant_crafting
Step 3: upgrading to Tier 2 and Tier 3
The higher tiers are upgrades in a chain. The Tier 2 Chance Pendant is made from your Tier 1 pendant, and the Tier 3 Chance Pendant is made from your Tier 2 pendant. You can't skip a tier.[4]
Crafting Shaped
Recipe id: chancecubes:tier_2_pendant_crafting
Crafting Shaped
Recipe id: chancecubes:tier_3_pendant_crafting
Side branches from the Tier 1 pendant
Two other items also branch off the Tier 1 pendant. They don't need Tier 2 or Tier 3, so you can make them as soon as you have the base pendant.[4]
- The Chance Cube Scanner is crafted from the Tier 1 pendant.[4]
- The Silk Touch Chance Pendant is also crafted from the Tier 1 pendant.[4]
Crafting Shaped
| any cheap glass blocks | ||
| any cheap glass blocks | any cheap glass blocks | |
| any cheap glass blocks |
Recipe id: chancecubes:cube_scanner_crafting
Crafting Shaped
| any string | any string | |
| any string | any string | |
| any string | any string |
Recipe id: chancecubes:silk_pendant_crafting
Unverified What each pendant tier changes about the rewards you get from a Chance Cube is not confirmed by the pack data available for this guide, so it is not described here.
Which Chance Cubes config options matter?
3 parts
Same as in the FTB Skies 2 1.22.0 guide
Chance Cubes keeps most of its settings in one server config file, plus a second file that switches individual rewards on and off. Here are the ones you're most likely to care about, and exactly how this pack sets them.[6][7]
World generation
The only value in the main config that the pack flags as changed from the mod default is [[config:config/chancecubes/chancecubes-server.toml#General Settings.SurfaceGenerationAmount]]. The pack sets it to 0, and the mod default is 100. The option's description says the chance of a chunk getting a surface cube is 1 divided by this number, and the listed valid range is above 0, so 0 is outside that range. What the game actually does with 0 is unverified.[6]
- [[config:config/chancecubes/chancecubes-server.toml#General Settings.GenerateOnSurface]] is false, so cubes don't generate on the surface of the world.[6]
- [[config:config/chancecubes/chancecubes-server.toml#General Settings.GenerateAsOre]] is false, so cubes don't generate like ores.[6]
- [[config:config/chancecubes/chancecubes-server.toml#General Settings.ChestLoot]] is false, so cubes don't show up as chest loot.[6]
- [[config:config/chancecubes/chancecubes-server.toml#General Settings.BlockedWorlds]] is an empty list, so no worlds are blocked.[6]
Chance values and rewards
[[config:config/chancecubes/chancecubes-server.toml#General Settings.ChanceRangeMin]] and [[config:config/chancecubes/chancecubes-server.toml#General Settings.ChanceRangeMax]] are both 10, which matches the mod default. Per the option's description, these set how far a cube's chance value can swing when it picks a reward.[6]
- [[config:config/chancecubes/chancecubes-server.toml#General Settings.D20UseNormalChanceValues]] is false, so D20s only have a chance value of either -100 or 100.[6]
- [[config:config/chancecubes/chancecubes-server.toml#General Settings.RewardsEqualChance]] is false, so chance values still matter when a reward is picked.[6]
- [[config:config/chancecubes/chancecubes-server.toml#General Settings.EnableDefaultRewards]] is true, so the default rewards are loaded.[6]
- [[config:config/chancecubes/chancecubes-server.toml#General Settings.PendantUses]] is 32, the mod default.[6]
- [[config:config/chancecubes/chancecubes-server.toml#General Settings.FallingBlockDropHeight]] is 20, the mod default.[6]
- [[config:config/chancecubes/chancecubes-server.toml#General Settings.DisableGiantCC]] is false, but the giant chance cube reward is switched off separately (see below).[6][7]
Rewards the pack turns off
The reward switches live in a separate file. In this pack these rewards are set to false: rewards.chancecubes:boss_demonic_blaze, rewards.chancecubes:boss_evil_witch, rewards.chancecubes:boss_mimic, rewards.chancecubes:boss_ravager, rewards.chancecubes:clear_inventory, rewards.chancecubes:inventory_bomb and rewards.chancecubes:giant_chance_cube. The ore and diamond rewards rewards.chancecubes:coal_to_diamonds, rewards.chancecubes:diamond_block, rewards.chancecubes:ores_galore and rewards.chancecubes:redstone_diamond are off too. Every other reward listed in that file is true.[7]
What changed in Chance Cubes between versions?
Chance Cubes has been in FTB Skies 2: Aero since 1.0.3 or earlier, so it has been part of the pack from the early releases. Version 1.10.0 ships with Chance Cubes 1.21.1-5.0.2.517.[8]
The mod's own changelog for 1.21.1-5.0.2.517 only says "Bug fixes" and doesn't list which ones. I can't tell you what exactly changed in that build.[9]
Unverified No pack changelog entries for Chance Cubes were available, so any changes the pack made to this mod between releases are unconfirmed.
Sources
- Chance Cubes project page (modrinth) · official mod data
- FTB Skies 2 1.22.0 mod list · pack file
- FTB Skies 2: Aero 1.10.0 config: config/chancecubes/chancecubes-server.toml · pack file
- FTB Skies 2: Aero 1.10.0 recipe dump: recipes making Chance Cubes items · pack recipe dump
- FTB Skies 2: Aero 1.10.0 config: config/chancecubes/global_rewards.json · pack file
- FTB Skies 2 1.22.0 config: config/chancecubes/chancecubes-server.toml · pack file
- FTB Skies 2 1.22.0 config: config/chancecubes/global_rewards.json · pack file
- FTB Skies 2: Aero 1.10.0 mod list · pack file
- Chance Cubes 1.21.1-5.0.2.517 changelog · changelog
Where this guide comes from
Written from what FTB Skies 2: Aero itself ships: its files and recipes, the in-game guidebooks and the mods' own pages. Every statement links to the source it came from, and the numbers are checked against the pack before publishing.
Guide last verified Oct 13, 2026.
Guides for other versions: 1.0.3 to 1.8.0
Report wrong info
Version in each release
21 releases, first in 1.0.3
| FTB Skies 2: Aero | Version | Jar | Where it came from |
|---|---|---|---|
| 1.13.0 Sep 28, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.12.1 Sep 22, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.12.0 Sep 21, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.10.0 Sep 8, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.9.1 Sep 2, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.9.0 Sep 1, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.8.0 Aug 25, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.7.3 Aug 19, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.7.2 Aug 18, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.7.1 Aug 18, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.6.1 Aug 13, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.6.0 Aug 11, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.5.1 Aug 8, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.4.1 Aug 4, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.4.0 Aug 3, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.3.0 Jul 30, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.2.1 Jul 28, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.2.0 Jul 28, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.1.1 Jul 25, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.1.0 Jul 24, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
| 1.0.3 Jul 17, 2026 | 1.21.1-5.0.2.517 | ChanceCubes-1.21.1-5.0.2.517.jar | From the published release |
"From pack files" means the list came from the pack's own files; "from the published release" means ForgeBase read the jars of the release itself.
Items and blocks
13 items from the 1.10.0 recipe dump.
Config options (how FTB Skies 2: Aero sets them)
204 settings shipped in the pack's config files; 1 differ from the mod's documented default.
Show settings
| Setting | FTB Skies 2: Aero value | Mod default |
|---|---|---|
General Settings.SurfaceGenerationAmount changed by FTB Skies 2: AeroChance of a chunk to have a chance cube spawned on the surface. The math is 1/(surfaceGenerationAmount), so increase to make more rare, and decrease to make more common. config/chancecubes/chancecubes-server.toml | 0 | 100 |
General Settings.BlockedWorlds Worlds that Chance cubes shold not generate in config/chancecubes/chancecubes-server.toml | [] | not documented |
General Settings.BlockRestoreBlacklist Blocks that should not be replaced when rewards are "restored" after a reward is over, i.e don't remove graves when the boss dome get's cleared config/chancecubes/chancecubes-server.toml | [] | not documented |
General Settings.ChestLoot True if Chance Cubes should generate as chest loot in the world. false if they should not config/chancecubes/chancecubes-server.toml | false | not documented |
General Settings.D20UseNormalChanceValues Set to true if the D20's should have any chance value from -100 to 100. Set to false to have the D20's only have a chance value of either -100 or 100 config/chancecubes/chancecubes-server.toml | false | not documented |
General Settings.DisableGiantCC Set to true Giant Chance Cubes should be disabled config/chancecubes/chancecubes-server.toml | false | not documented |
Comments and tips
Loading comments...