Astral Chunk

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

It can be purchased from the Wizard for after the Astrum Aureus has been defeated.

Trivia

 * The item was previously used to summon the Astrageldon Slime at nighttime, before it was replaced by Astrum Aureus.