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  • Heresy.gif
Stack digit 1.png
TypeWeaponCrafting material
Damage960 Magic
Knockback0 (No Knockback)
Mana cost15
Critical chance4%
Use time120 Snail
TooltipReleases fire and souls upward from a held book
As the book is held the power of both increases
RarityRarity Level: 15
Sell 48 Gold Coin.png
Research1 required
Projectiles created
Lost Soul Gold
Gilded Soul
Lost Soul Small
Lost Soul
Lost Soul Giant
Vengeful Soul
Heresy Book.gif
Holdout Book
Dropped by
Supreme Witch, Calamitas
Supreme Alchemist, Cirrus
125% / 33.33% Expert Mode

Heresy is a post-Moon Lord spell tome that is dropped by Supreme Witch, Calamitas. It fires flame particles and souls upwards, which can travel through solid tiles but only home into enemies when solid tiles are not present. The time taken to fire varies from 0.33-0.47 seconds initially, but linearly speeds up to 0.07-0.2 seconds after 2 seconds of holding the book.

Its best modifier is Mythical. However, the weapon's knockback will not be affected due to already being 0.


Used in


  • Heresy is an act or belief that conflicts with established beliefs or customs.
Heresy in use.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
  • Increased sell price from 30 Gold Coin to 48 Gold Coin.
  • Nerfed damage from 990 to 960, and mana cost from 10 to 15.