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Treasure Bag.gif Expert Mode-Only Content: This information (or parts of it) applies only to Expert mode and Expert mode worlds.
This is developer content! It is dedicated to: Cerberus
Aleister Book
  • Aleister Book item sprite
  • Invoker Book Tile (Ancients Awakened).png
Stack digit 1.png
TypeAccessoryCrafting material
TooltipA legendary book of the Mega Therion
10% increased minion damage
+2 max minions
Maybe you could make it stronger...?
There's a note written onto the book:
I need more powerful souls; *****, *********, *********
RarityRarity level: 8

Aleister Book is a Hardmode tier Expert Mode-exclusive accessory that is obtained from the Treasure Bags when opened in Hardmode or hidden amongst the Books on shelves in the Dungeon after Plantera has been defeated. When equipped, it increases your minion damage by 10% and grants +2 minion slots. After killing certain bosses, the buffs granted become stronger.


Used in[]

ResultIngredientsCrafting station
The Book of LawThe Book of Law
Ancients Awakened/Quantum Fusion AcceleratorQuantum Fusion Accelerator


  • This, along with A Page of the Rune Book, are the only accessories obtainable from developer bags, and can be upgraded into EX variants.
  • The bosses required to empower the book are unknown.
Equipable Items: Mushium Shirt (Ancients Awakened).png Armor • Ash-Proof Vest (Ancients Awakened).png Accessories ( Demon Gauntlet (Ancients Awakened).png Combat ) • Midnight Scarf (Ancients Awakened).png Vanity