Calamity Mod Wiki
Cragmaw Mire
EnvironmentAcid Rain
AI TypeCragmaw Mire AI
Damage66 / 112 (Tier 2 Contact)
60 / 120 (Tier 2 Bubble)
80 / 160 (Tier 2 Beam)
160 / 272 (Tier 3 Contact)
94 / 188 (Tier 3 Bubble)
240 / 480 (Tier 3 Beam)
0 (Tether)
104 / 208 (Spike)
138 / 276 (Droplet)
Max Life4,000 / 6,400 (Tier 2)
80,630 / 129,008 (Tier 3)
Defense25 (Tier 2)
80 (Tier 3)
KB Resist100%
Inflicts debuffIrradiatedIrradiated
100% chance
Debuff duration5 seconds
Debuff tooltipYour skin is burning off
Immune toConfusedPearl AuraSlowIrradiatedSulphuric Poisoning

The Cragmaw Mire is a Hardmode, post-Aquatic Scourge mini boss that spawns during the Acid Rain event. They spawn on the Sulphurous Sea floor and cannot move.


The Cragmaw Mire is gravity-affected and completely stationary enemy. It randomly spawns enemies around nearby liquid and cycles between two attacks every 7 seconds.

  • For 4 seconds, it fires acid bubbles consistently which float upwards, splitting into four crosses after 2-3 seconds or upon tile collision once fully materialized. Crosses explode upon impact with tiles, dealing damage to a small area.
  • It pauses for 1 second to charge up a laser beam attack, and a column of harmless dust is formed. Then, a laser beam fires upwards and lingers for 2 seconds.

Tier 3

  • Bubbles are fired every 0.4 seconds instead of 0.83 seconds
  • While the laser is fired, acid droplets are also rapidly fired.
  • Transforms into its second phase at 70% / 85% health, changing its appearance. In this phase, it loses the ability to spawn enemies and fire bubbles. Instead, it summons a tether that reels the player into itself, and fires a randomized spread of 16 gravity-affected spikes every 10 seconds.


Image Name Condition
Trilobite Trilobite -
Water Leech Water Leech -
Gamma Slime Gamma Slime Required to be Tier 3.
Nuclear Toad Nuclear Toad Required to be Tier 3.
Orthocera Orthocera Required to be Tier 3.


  • The Cragmaw Mire has 50% DR in its first phase, 30% if the player is submerged. In its second phase, its DR is dropped to 0% / 12.5%.
  • Once the bubble fully materializes after 1.67 seconds, the damage dealt drops to 40 / 80 in all tiers. This damage value is also inherited to the crosses and its explosions.


  • The Cragmaw Mire's appearance was inspired by a submission for a sulphurous sea design contest that was held on the Calamity art server. The original artwork, made by Ox#8375, used the name "Azufre Piercer".
  • The tether is referred to as 'CragmawVibeCheckChain' in the mod's source files.
  • The jaw of the Cragmaw Mire was inspired by a bear trap.