Astral Chunk

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Astral Chunk
  • Astral Chunk.png
Stack digit 1.png
Use time10 Fast
TooltipSummons Astrum Aureus when used in the Astral Infection
Enrages during the day while outside the Astral Infection
Not consumable
RarityRarity Level: 7
SellNo value
Research1 required

The Astral Chunk is a craftable Hardmode item used to summon the Astrum Aureus boss. It can only be used in the Astral Infection.



Crafting Station
Mythril AnvilMythril Anvil
Orichalcum AnvilOrichalcum Anvil
Fallen StarFallen Star20
Astral ChunkAstral Chunk1


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
  • Tooltip now clarifies that it must be used in the Astral Infection at night.
    • Now non-consumable and stacks to 1.
    • Can no longer be used during Boss Rush.
    • Now spawns Astrum Aureus with an increased offset to prevent cheap hits.
    • Now uses 30 Stardust and 20 Fallen Stars in its recipe instead of 15 and 10.
  • Can now only be used in the Astral Infection.
  • Tooltip now mentions the name of what boss it spawns.
  • Fixed Armageddon and it having their sprites switched.
    • Now uses 10 Fallen Stars and 15 Stardust in its recipe instead of 5 Fallen Stars, 3 Living Shards, and 10 Stardust.
    • Resprited.
    • Fixed it spawning Astrageldon Slime directly on top of the player.
    • Now sold by the Wizard after defeating Astrageldon Slime.
    • Can now only be used at night.
    • Now uses the boss roar sound effect instead of Item44 when used.
    • Now directly spawns the boss instead of using an invisible projectile.