Cragmaw Mire

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Cragmaw Mire
Cragmaw Mire (Phase 1).png Cragmaw Mire (Phase 2).png
EnvironmentAcid Rain
DamageThis attack will cause defense damage on hit. 66 / 112 Expert Mode / 168 Master Mode (Tier 2 Contact)
80 / 160 Expert Mode / 240 Master Mode (Tier 2 Beam)
40 / 80 Expert Mode / 120 Master Mode (Tier 2 Beam Droplet)
45 / 91 Expert Mode / 136 Master Mode (Tier 2 Slam Droplet)
76 / 152 Expert Mode / 228 Master Mode (Tier 2 Explosion)
66 / 132 Expert Mode / 198 Master Mode (Tier 2 Spike)
This attack will cause defense damage on hit. 160 / 272 Expert Mode / 408 Master Mode (Tier 3 Contact)
240 / 480 Expert Mode / 720 Master Mode (Tier 3 Beam)
120 / 240 Expert Mode / 360 Master Mode (Tier 3 Beam Droplet)
86 / 172 Expert Mode / 258 Master Mode (Tier 3 Slam Droplet)
144 / 288 Expert Mode / 432 Master Mode (Tier 3 Explosion)
104 / 208 Expert Mode / 312 Master Mode (Tier 3 Spike)
0 (Tether)
Max Life4000 / 6400 Expert Mode / 9600 Master Mode (Tier 2)
80630 / 129008 Expert Mode / 193512 Master Mode (Tier 3)
Defense25 (Tier 2)
80 (Tier 3)
KB Resist100%
Inflicts debuffIrradiatedIrradiated
100% chance
Debuff duration5 seconds (Contact)
1 second (Droplet)
Debuff tooltipYour skin is burning off
Immune toConfusedPoisonedAcid VenomPearl AuraKami FluIrradiatedSulphuric Poisoning

The Cragmaw Mire is a Hardmode, post-Aquatic Scourge mini boss that spawns during the Acid Rain event. It will always spawn underwater, on the Sulphurous Sea's ocean floor.


The Cragmaw Mire is a gravity-affected and mostly stationary enemy. It cycles randomly between three attacks:

  • Fires an even ring of five spikes around itself twice in quick succession. It switches to another attack after four seconds have passed.
  • Teleports above the player and attempts to drop directly onto them. On impact with a surface, an explosion is created alongside a burst of 12 homing acid droplets. It switches to another attack after performing two slams.
  • Teleports underneath the player and charges up a laser beam for one second. The laser beam lasts for two seconds and periodically releases homing acid droplets in random directions. It switches to another attack after the laser beam fully dissipates.

Tier 3

  • Teleports faster in the laser beam attack and takes 25% less time to charge the laser.
  • Teleports faster in the slam attack and falls 26.32% faster.
  • Fires three more spikes per ring with increased projectile speed and takes 21.74% less time to fire, allowing it to fire three rings instead of two.
  • Transforms into its second phase at 70% / 85% Revengeance Mode health, changing its appearance.
    • Gains the ability to fire a tether that attempts to grab the player, reeling them into itself if it lands. The tether has a lifetime of six seconds regardless of whether it hits or not.
    • Fires one additional spike per ring and takes 13.89% less time to fire.
    • Teleports even faster in the slam attack and falls 6.25% faster.
    • Teleports even faster in the laser beam attack.


  • The Cragmaw Mire spawns under the water, so it is recommended that the player dives into the water to lessen the chance of missing potential spawns.


  • The BestiaryBestiary entry for the Cragmaw Mire: "Within its calcified shell which has formed against all logic in the sulphurous sea, a gelatinous body stirs. It is also host to a long grappling creature, which helps it grab prey in exchange for protection."
  • 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.