Calamity Mod Wiki
Gamma Heart
  • Gamma Heart.png
Stack digit 1.png
Damage173 Summon
Knockback3 (Very Weak)
Use time14 Very Fast
TooltipSummons radioactive heads that are bound by your body
Grants BuffGamma Hydra (buff)Gamma Hydra
Buff tooltip...
Inflicts DebuffSulphuric PoisoningSulphuric Poisoning
100% chance

Debuff duration4 seconds (Gamma Bullet)
Debuff tooltipThe acidic water burns away your flesh
RarityRarity Level: 13
Sell 26 Gold Coin.png
Projectiles created
Gamma Canister
Gamma Canister
Gamma Shot
Gamma Bullet
Dropped by
Nuclear Terror133.33%
Summons Minion
Gamma Hydra
Gamma Hydra.png

The Gamma Heart is a post-Moon Lord summon weapon that drops from Nuclear Terrors. It summons a Gamma Hydra that is attached to the player; summoning the item again will add a head in exchange for taking up another minion slot. The heads fire Gamma Canisters in an arc at nearby enemies which inflict the Sulphuric Poisoning debuff. Each canister splits into 6 Gamma Bullets upon contacting an enemy or tile, each of which deals half the original weapon's damage and will home into enemies after exactly 1.1666 seconds.

Its best modifier is Ruthless. The Mythical modifier provides the widest array of stat bonuses, but these primarily affect the initial summon rather than the resulting minion. Additionally, minions cannot deal critical hits. The only lasting advantage a Mythical Gamma Heart has over a Ruthless one is knockback.


  • Like the Nuclear Terror, The Gamma Hydra's design was inspired, albeit more directly, by the Horror character from the game Nuclear Throne.

The Gamma Heart's Gamma Hydras. Notice how the Hydras are unable to fire through blocks and how the bullets created from the canisters have a delayed homing effect.

also Hades reference