Cosmic Crucible
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Spoiler Warning! |
| This page contains spoilers, proceed at your own risk! |
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Cosmic Crucible is a unique device that can upgrade items far beyond their normal stats. They can be found in Underground Precursor biomes, in the Precursor Ruins mission, and in a hidden area of the Science Outpost.
Weapons can be improved from level 1 up to level 10.
Updated as of v5.6.347
The Cosmic Crucible and the tiles below it are impervious to any attempts to remove it. If you somehow remove the Cosmic Crucible, no items will be dropped (not even the anvil).
Stats Upgrade Per Level
Tools
|
Tool (if given) |
Parameter (if applicable) | Additive Increase | Multiplicative Increase |
|---|---|---|---|
| Fishing Rod | Reel Length
Reel Speed Line Break Time |
+ 10 length
+2 speed +0.1 seconds |
|
| Parasol | AirForce
Run Speed Walk Speed Max Fall Speed |
- 4 Max Fall Speed | x 1.15 AirForce
x 1.15 Run Speed x 1.15 Walk Speed |
| Other tools | Firing Time
Block Radius Alt Block Radius |
+1 Block Radius
+1 Alt Block Radius |
x 1.15 Firing Time |
Shields
| Shields | Parameter | Additive Increase | Multiplicative Increase |
|---|---|---|---|
| Shields |
Shield Bash Energy Bonus |
+ 0.5 +base value Shield Bash + 0.5 Shield Bash Push |
x 0.98 Cooldown Time x 1.05 Energy bonus |
Weapons
| Weapon | Parameter (if applicable) | Additive Increase | Multiplicative Increase | ||
|---|---|---|---|---|---|
| Wand/Staff |
Primary ability Damage |
+ Upgrade lvl / 4 Max Cast Range | x 1.15 damage | ||
| Magnorbs | Shield Knockback Shield Energy Cost Shield Health |
+1 Shield Knockback |
|||
|
Projectiles |
Primary ability Damage Control Force |
+ upgrade lvl / 7 dmg + upgrade lvl Control Force |
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| Beam Weapons | Beam Length | + Upgrade lvl Beam Length | |||
| Primary Atk uses Energy | Energy Cost | - Upgrade lvl /3 Energy Cost | |||
| Rapier, Mace, Katana | Crit Chance Crit Dmg |
+ 0.15 Crit Chance |
|||
| All Others | Crit Chance Crit Dmg |
+ 0.10 Crit Chance + 0.5 Crit Dmg |
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| Rapier, Axe, Hammer, Katana, Mace, Great Axe, Scythe |
Fire Rate (Time) Note: The minimum is 0.1 |
No Change :( | |||
| All except Rapier, Axe, Hammer, Katana, Mace, Great Axe, Scythe |
Fire Rate (Time) Note: The minimum is 0.1 |
Fire Rate = Where Original is the fire rate value currently. | |||
| Anything with primary atk and DPS |
DPS Note: Won't upgrade if DPS is at or above 20 |
DPS =
Original * [1+ (upgrade lvl/ 80)] | |||
| Stun weapons (mace, hammer, greataxe, quarterstaff) | Stun Chance | + 0.5 +base value Stun Chance | |||
Extra Dungeons Upgrade Anvil

Some Extra Dungeons, and the Heaven instance found at the end of in-world dungeons, contain a variant of the Cosmic Crucible, appearing as a red variant of the vanilla Weapon Upgrade Anvil. This anvil acts in an identical manner to the Crucible, with the same interface, capabilities, and essence costs.
Fake Cosmic Crucible
There is also a fake Cosmic Crucible that is rigged with instakilling bees (that can also bypass admin mode) by Kevin. The rigged version is inaccessible by normal means, and can be only spawned in, which immediately releases the bees.
