Calamity Mod Wiki
Altar of the Accursed
  • Altar of the Accursed.png
  • Altar of the Accursed placed graphic
Stack digit 9.pngStack digit 9.pngStack digit 9.pngStack digit 9.png
PlaceableTango Tick1.png
Dimensions4 wide × 3 high
Use time14 Very Fast
TooltipOffer Ashes of Calamity at this altar to summon the Witch
Doing so will create a square arena of blocks, with the altar at its center
During the battle, heart pickups only heal for half as much
Map color#2B132A ●
RarityRarity Level: 15
SellNo value

The Altar of the Accursed is a craftable post-Moon Lord furniture item. When right-clicked, it is used to summon Supreme Calamitas while Ashes of Calamity or a Ceremonial Urn is in the player's inventory. Upon successfully summoning the boss, one Ashes of Calamity is removed from the player's inventory if the player does not have a Ceremonial Urn, and the sky darkens, summoning Supreme Calamitas shortly after.



Crafting Station
Cosmic AnvilCosmic Anvil
Brimstone SlagBrimstone Slag30
Auric BarAuric Bar5
Core of CalamityCore of Calamity1
Altar of the AccursedAltar of the Accursed1


  • The Altar of the Accursed cannot be destroyed by explosives.
  • The Altar of the Accursed can be highlighted by the Spelunker Potion effect.