Heat Spirit

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Heat Spirit
Heat Spirit.png
TypeFlying Enemy
EnvironmentBrimstone Crag
Damage33 / 66 Expert Mode / 99 Master Mode
Max Life50 / 100 Expert Mode / 150 Master Mode
KB Resist100%
Inflicts debuffBrimstone FlamesBrimstone Flames
100% chance

Debuff duration1 second
Debuff tooltipIncinerating both body and mind
Immune toBrimstone FlamesOn Fire!Hellfire
BannerHeat Spirit BannerHeat Spirit Banner
Cold Bestiary Cold.pngVulnerable
Water Bestiary Water.pngVulnerable
Sickness Bestiary Sickness.png-
Electricity Bestiary Electricity.png-
Heat Bestiary Heat.pngResistant

The Heat Spirit is a pre-Hardmode enemy that spawns in the Brimstone Crag. It charges around at high speeds and attempts to ram the player for high damage, and once it leaves a small area around the player, it turns around to charge back again.


  • The BestiaryBestiary entry for the Heat Spirit: "Citizens of Azafure who committed heinous crimes were cast out of the city and forced to don unremovable obsidian skulls as a mark of their sins, to let all know of their vile acts. Now the lost souls of those who were exiled are finally able to return home after the city’s fall, the skulls they wore being all that remains of them."
  • The Heat Spirit's appearance resembles the Lost Soul Demon from the game DOOM (2016).
  • It is the only enemy in the Brimstone Crag that does not gain an increase in stats or drop Bloodstone after Providence is defeated.


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 has 25% less health and 10% less damage in Master Mode.
  • Fixed its bestiary entry using the wrong apostrophe.
  • Decreased Brimstone Flames duration from 2 seconds to 1.
    • Increased chance to drop Essence of Havoc from 33.33% to 50%.
    • Fixed it having an incorrect bestiary offset.
  • Now vulnerable to cold and water debuffs, but resistant to heat debuffs.
    • No longer inflicts On Fire!.
    • Now spawns anytime in the Brimstone Crag instead of in the Underworld in Hardmode. Essence of Chaos will only drop in Hardmode.
    • No longer takes up half an NPC slot.
    • Resprited.
  • Decreased chance to drop an Essence of Chaos from 50% to 25%.
  • Decreased minimum coin drop amount from 5 Silver Coin to 1 Silver Coin.
    • Decreased On Fire! duration from 2 / 3 Expert Mode seconds to 2.
    • Increased Brimstone Flames duration from 0.67 / 1.33 Expert Mode seconds to 2.
  • Nerfed health from 60 / 120 Expert Mode to 50 / 100 Expert Mode, and damage from 50 / 100 Expert Mode to 33 / 66 Expert Mode.
  • Nerfed health from 110 / 132 Expert Mode to 60 / 120 Expert Mode, and damage from 66 / 105 Expert Mode to 50 / 100 Expert Mode.
  • Now uses vanilla enemy spawn chance instead of custom one.
  • 1.1.7: No longer has gores.
    • Now produces less dust when hit.
    • Now produces dust when killed.