Calamity Mod Wiki
The Atom Splitter
  • The Atom Splitter.png
Stack digit 1.png
Damage320 Rogue
Knockback7 (Strong)
Critical chance4%
Use time24 Fast
TooltipThrows a quantum-superimposed javelin that strikes from numerous timelines at once
Stealth strikes perform far more simultaneous strikes
RarityRarity Level: 15
Sell 30 Gold Coin.png
Dropped by
Exo Mechs (Artemis and Apollo)150% / 66.67%

The Atom Splitter is a post-Moon Lord javelin that drops from the Exo Mechs after XS-01 Artemis and XS-03 Apollo have been defeated last. It throws out a gravity-defying javelin that travels through tiles and emits light. Upon contact with an enemy, 15 rainbow javelins randomly appear from all sides of the target, each dealing 70% damage and pierces twice but have a very short lifespan.

Performing a stealth strike with The Atom Splitter will cause the resulting javelin to spawn 100 rainbow javelins with 14.4% damage each.

Its best modifier is Flawless.


  • The item's name refers to how, in real life, the act of splitting an atom has the potential to release excessive amounts of heat, or even create large explosions.