Rot Ball

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Rot Ball
  • Rot Ball.png
Stack digit 9.pngStack digit 9.pngStack digit 9.pngStack digit 9.png
Damage26 Rogue
Knockback2.5 (Very Weak)
Critical chance12%
Use time12 Fast
TooltipStealth strikes spawn rain clouds on enemy hits
Inflicts DebuffBrain RotBrain Rot
100% chance

Debuff duration1.5 seconds
Debuff tooltipYour neurons are popping like corn kernels
RarityRarity Level: 3
Sell 2 Silver Coin.png
Research99 required
Projectiles created
Shade Nimbus Cloud
Shade Nimbus Cloud
Shade Nimbus
Shade Nimbus
Dropped by
The Hive Mind30-50 / 50-75 Expert Mode25% / 33.33% Expert Mode

Rot Balls are craftable Pre-Hardmode rogue weapons that are also dropped by The Hive Mind. They can pierce two enemies before breaking. They have a 50% chance of being recovered after being thrown. They function almost identically to Tooth Balls.

Performing a stealth strike with Rot Balls causes a shaderain cloud to spawn above every enemy that is hit and rain down raindrops that damage enemies. Both the weapon and stealth strikes inflict the Brain Rot debuff.

The Rot Ball cannot be reforged, and therefore cannot have modifiers.



Crafting Station
Demon AltarDemon Altar
Crimson AltarCrimson Altar
Demonite BarDemonite Bar1
Rotten MatterRotten Matter1
Rotten ChunkRotten Chunk1
Rot BallRot Ball100


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
  • Now inflicts Brain Rot for 1.5 seconds, but stealth strike rain now inflicts Brain Rot instead of Cursed Inferno.
    • Now properly grants local immunity frames.
    • Moved Demonite Bar to the top of the recipe.
  • Now drops at a 25% chance in Classic Mode instead of 100%, and is included in the weighted drop stack.
    • Can now be dropped in Normal Mode.
    • Increased drop count from 50-74 Expert Mode to 50-75 Expert Mode.
    • No longer bounces.
  • Buffed damage from 18 to 20, use time from 17 to 12, and critical strike chance from 5% to 8%.