Calamity Mod Wiki
  • Metastasis.png
Stack digit 1.png
Damage666 Summon
Knockback2 (Very Weak)
Use time9 Very Fast
TooltipSummons a sepulcher to fight for you
While the sepulcher is active brimstone hearts will begin to appear and orbit you
It will attempt to attack you more and more frequently depending on how many hearts are present
It takes up 4 minion slots and it can only be summoned once
A contemplated possible future of the cosmic serpent,
A gruesome warning for those blinded by the hunger for power.
Grants BuffSepulcher (buff)Sepulcher
Buff tooltipIt is not benevolent
Inflicts DebuffBrimstone FlamesBrimstone Flames
100% chance

Debuff duration4 seconds (Dart)
Debuff tooltipRapid health loss
RarityRarity Level: 15
Sell 30 Gold Coin.png
Projectile created
Brimstone Dart
Exhumed Brimstone Heart
Brimstone Heart.png
TypeFlying Enemy
AI TypeExhumed Brimstone Heart AI
Max Life51,740
KB Resist100%
Summons Minion

The Metastasis is a post-Moon Lord summon weapon. It is the exhumed form of the Staff of the Mechworm. It summons a full-sized Sepulcher which follows the player. Sepulcher takes four minion slots and attacks by alternating between firing Brimstone Darts from its segments and rapidly charging the target back and forth. Every seven seconds, an Exhumed Brimstone Heart spawns which orbits around the player. If there are over two hearts present, each additional heart will increase the chance for Sepulcher to enrage by 25%. When enraged, Sepulcher will charge towards the player, dealing 160-180 / 320-360 damage to the player. Sepulcher will not target nor directly damage the Brimstone Hearts.

Only one Sepulcher may be summoned at once, regardless of how many minion slots the player has.

Its best modifier is Ruthless. The Mythical modifier provides the widest array of stat bonuses, but these primarily affect the initial summon rather than the resulting minion. Additionally, minions cannot deal critical hits. The only lasting advantage a Mythical Metastasis has over a Ruthless one is knockback.


  • This weapon is best used alongside other summons that can take care of the Brimstone Hearts, while the Sepulcher stays focused on enemies.
  • Desummoning and resummoning the Sepulcher will despawn all the hearts, allowing the player's other summons to focus elsewhere.


  • Metastasis refers to the process where cancer cells spread from the place where they formed to another area of the body.
  • The weapon's tooltip heavily implies that the Sepulcher is what The Devourer of Gods could become should it continue to blindly aim for more power. This is reinforced by the fact that this weapon is the Exhumed variant of the Staff of the Mechworm.
  • The damage amount of 666 refers to the biblical Revelation, specifically the number of the beast