Zanthu Tablets
From Arkham Horror Wiki
Card info
Type: Tome
Movement: Exhaust and spend 2 movement points to make a Lore (-2) check. If you pass, draw 5 Spells, choose 1 to keep, and place the rest on the top or bottom of the Spell deck in any order. Then discard Zanthu Tablets. If you fail, lose 1 Sanity.
Price: $7
Mythos Source
The Zanthu Tablets first appeared in The Dweller in the Tomb (1971), written by Lin Carter.