Calamity Mod Wiki
AI TypeCalamitas AI
70 / 112 / 128 / 136 (pre-Providence)
240 / 336 / 384 / 408 (post-Providence)
Brimstone Hellblast:
70 / 112 / 128 / 140 (pre-Providence)
130 / 232 / 290 / 333 (post-Providence)
Brimstone Hellfireball:
84 / 136 / 170 / 195 (pre-Providence)
144 / 256 / 320 / 368 (post-Providence)
Max Life37,500 / 60,000 / 72,000 (pre-Providence)
90,000 / 120,000 / 144,000 (post-Providence)
Defense25 (pre-Providence)
75 (post-Providence)
KB Resist100%
Inflicts debuffBrimstone FlamesBrimstone Flames
100% chance
Debuff duration2 seconds (Brimstone Laser)
4 seconds (Brimstone Hellfireball and Explosions)
3 seconds (Contact)
Debuff tooltipRapid health loss
Immune toConfusedPearl AuraAbyssal FlamesBrimstone Flames
Coins 15 Gold Coin.png
Calamitas map.png
Map Icon
Not to be confused with Supreme Calamitas, a post-Moon Lord boss.

Calamitas Trophy.png "You underestimate my power..." Calamitas Trophy.png

Calamitas is a Hardmode boss fought at night. She is a significant mid-Hardmode boss that is intended to be challenged soon before, or alternatively to, Plantera.

She increases substantially in difficulty once Providence, the Profaned Goddess has been defeated, boosting the health and damage of her and her brothers, and she will begin dropping Bloodstone.


Calamitas does not spawn on her own and requires the player to summon her with the Eye of Desolation during the Night.


Calamitas will behave primarily like Retinazer, firing projectiles and chasing the player. At different points throughout the fight, she will summon minions and her brothers to assist her. If it becomes daytime during the battle, Calamitas and her brothers will enrage, moving faster and shooting higher velocity projectiles. Cataclysm's flamethrower range will also greatly increase.


  • Calamitas alternates between hovering above the player and firing two Brimstone Hellfireballs that accelerate over time and explode on contact with tiles, and horizontally leveling herself with the player and firing 4 accelerating Brimstone Hellblasts at them.
  • Upon reaching 70% HP, her sprite will change as she goes invisible and invulnerable, before summoning a "bullet hell" of horizontal and vertical moving Brimstone Hellblasts which lasts 15 seconds. While the attack is in progress, Calamitas will hover above the player, but will not attack.
  • When Calamitas' health reaches 40%, she summons the metallic brother Catastrophe and the fleshy brother Cataclysm. Catastrophe will alternate between spitting bouncing brimstone fireballs and quickly charging at the player four times, while Cataclysm will alternate between breathing a brimstone flamethrower and charging at the player three times.
    • Neither brother will fire anything until shortly after spawning, to prevent cheap hits.
    • Calamitas herself will stop firing Brimstone Hellblasts while the brothers are alive.
  • When Calamitas' health reaches 35%, she will summon an orbiting ring of five Soul Seekers around her. While Soul Seekers are alive, laser-firing Life Seekers will periodically spawn. The spawn rate of Life Seekers scales with the number of remaining Soul Seekers.
  • When Calamitas' health reaches 10%, she will go invulnerable and initiate a second bullet-hell attack, this time with added Brimstone Fireblasts fired from offscreen which home in on the player and explode into rings of Brimstone Darts.

In Expert Mode[]

  • Calamitas' brothers MUST be defeated for her to take damage again.
  • Calamitas and her brothers attack and shoot more aggressively.

In Revengeance Mode[]

  • Calamitas and her brothers attack and shoot even more aggressively.
  • When Calamitas' health is below 75%, she charges at the player twice following her fireball and hellblast attacks whenever no brothers are alive.
  • When Calamitas' health is below 10%, she will begin charging repeatedly until she is defeated.

In Death Mode[]

  • Calamitas shoots even more aggressively.
  • She summons a ring of ten Soul Seekers around her instead of five when she reaches 35% health.


CatastropheBrother of Calamitas
TypeFlying Enemy
AI TypeCatastrophe AI
65 / 130 / 150 / 162 (pre-Providence)
195 / 390 / 448 / 483 (post-Providence)
Brimstone Fireball:
72 / 116 / 136 / 144 (pre-Providence)
132 / 236 / 295 / 339 (post-Providence)
Max Life7,500 / 15,000 / 22,050 (pre-Providence)
15,000 / 30,000 / 44,100 (post-Providence)
Defense10 (pre-Providence)
30 (post-Providence)
KB Resist100%
Inflicts debuffBrimstone FlamesBrimstone Flames
100% chance
Debuff duration2 seconds (Brimstone Fireball)
3 seconds (Contact)
Debuff tooltipRapid health loss
Immune toConfusedPearl AuraAbyssal FlamesBrimstone Flames
Catastrophe map.png
Map Icon
CataclysmBrother of Calamitas
TypeFlying Enemy
AI TypeCataclysm AI
60 / 120 / 138 / 148 (pre-Providence)
170 / 340 / 390 / 421 (post-Providence)
Brimstone Flamethrower:
76 / 120 / 140 / 152 (pre-Providence)
136 / 240 / 300 / 345 (post-Providence)
Max Life9,000 / 18,000 / 26,400 (pre-Providence)
18,000 / 36,000 / 52,800 (post-Providence]])
Defense10 (pre-Providence)
80 (post-Providence)
KB Resist100%
Inflicts debuffBrimstone FlamesBrimstone Flames
100% chance
Debuff duration3 seconds (Brimstone Flamethrower)
3 seconds (Contact)
Debuff tooltipRapid health loss
Immune toConfusedPearl AuraAbyssal FlamesBrimstone Flames
Cataclysm map.png
Map Icon
Life Seeker
Life Seeker.png
TypeFlying Enemy
AI TypeFlying AI
Damage0 (Contact)
50 / 88 (Lasers)
Max Life200 / 400
KB Resist75% / 77.5%
100% (while the Boss Rush is active)
Immune toConfusedPearl AuraAbyssal FlamesBrimstone Flames
Image Name Condition
Soul Seeker Soul Seeker At 35% health



For more elaborate strategies on defeating Calamitas, including weapon and arena recommendations, see Guide:Calamitas strategies.
  • Making a large circle or oval around Calamitas, and/or going up and down with the help of platforms will allow you to dodge many of her attacks and her brother's charges.
  • Calamitas’ brothers can quickly overwhelm you especially on Revengeance or Death Mode, make sure to deal with them as quickly as possible; Adrenaline can be very helpful.
  • Use a Rod of Discord to avoid the brothers when they spawn to avoid any unnecessary contact damage.


  • The theme of Calamitas is Raw, Unfiltered Calamity, which was composed by the artist DM DOKURO.
    • Prior to her current theme being introduced, her theme was a remix of the Boss 2 theme made by silentzorah.
    • The song features motifs from previous bosses in the Calamity Mod:
    • If the Calamity Music add-on mod is disabled, Boss 2 will play instead.
  • Calamitas is Latin for "disaster".
  • The names of Calamitas and her brothers all denote a kind of violent event or destruction, all of which start with the letter C (Calamitas, Catastrophe, and Cataclysm).
  • When she is defeated, her death message reads "The Calamitas Clone has been defeated!"
    • Reinforcing this, her entry on the official Calamity Mod forum post and her lore item refers to her as "Calamitas Clone" as well. These, along with the lore item's mention of the "bloody inferno" still lingering, are foreshadowing Supreme Calamitas.
    • Prior to the update, the death message was "A Calamitas Doppelganger has been defeated!"
    • As a result, Calamitas is often referred to as "Clonelamitas" by the community.
  • The quote said by Calamitas "Impressive child, most impressive" is likely a reference to Senator Armstrong from Metal Gear Rising: Revengeance, who says the line "Impressive, Jack, most impressive".
  • Prior to her current lore entry, Calamitas used the lore entry that is currently used by Supreme Calamitas.
  • When first introduced, her original sprite was a recolor of Retinazer's second form.
  • If the Boss Checklist Mod is installed, her unique despawn message will be "If you wanted a fight, you should've come more prepared."


Absolute mastery over the forces of darkness. Enough magical power to reduce whole oceans to barren deserts. The bane of the Underworld. It was with great reason that such a powerful witch, whose very title became synonymous with the disaster she heralded, was considered the prized jewel of Yharim's world-conquering forces. If she were to rebel, she would slaughter anything Yharim threw at her unless he himself confronted her - and even then, the outcome was questionable. He needed insurance in the form of an unwaveringly loyal countermeasure.

The many attempts to clone Yharon were a colossal failure, but the knowledge gleaned from them became immensely valuable. Personally overseen by the Jungle Tyrant, another project was silently initiated to produce clones of Calamitas. Physical shells were molded and artificial souls filled them, derived from past experiments and Calamitas’ own brand of necromancy. The resulting child of science and dark magic would inevitably be weaker than the original, but that too would be beneficial in its own right.

However, even with the utmost secrecy enforced by Yharim’s efforts, they underestimated the capabilities of the witch. When the project’s lead necromancer was lost in a disaster gathering souls from the depths of hell, Calamitas took an interest in the skilled mage’s demise and personally dredged his soul from the void of death. Although his thoughts were reduced to mad gibberish, she tore enough knowledge from his fragmented mind to confirm her growing suspicions of Yharim.

The tyrant’s fear was realized; she betrayed him. Loosed into the Temple by Calamitas, the reactivated Golem’s trail of chaos swept through their hidden laboratory and breached the developing clone’s containment. Yharim’s forces swiftly destroyed the rampaging machine, but the damage was done. The clone created as a contingency against Calamitas’ betrayal had escaped - freed after inciting that very betrayal. That replica aimlessly roams the night with no will and no purpose, knowing nothing but to act and fight exactly as it was designed to from birth.