Hidden (Spot DC 11) until it moves. If initiating combat while Hidden, Heroes roll Initiative with Disadvantage.
Immune to Poison and Psychic.
- •Chained Book.
Move 2, then (Reach 4) 1d8, Grappled (Escape DC12). Can Grapple a number of Creatures equal to the number of Chained Books it has, starting equal to the number of Heroes.
- •Grapple Slam.
(Grapple Creature) Pull 3, then 1d8+5, ends Grapple.
The Library now has a number of Chained Books equal to half the number of Heroes after several break off. Gains Brain Drain.
Brain Drain. (Grappled Creature) 2d8+1 Psychic (ignores Defense), Dazed.
The Library is falling apart! 10 more damage and its destroyed. Until then, it regains control of all of the severed Chained Books using the psychic energy it siphoned from the Heroes. Their Reach increases to 8 and Grapple Slam's Pull increases to 7.
Adapted from Candlekeep Mysteries (5e).