Antimagic Susceptibility. The swarm is incapacitated while in the area of an antimagic field. If targeted by dispel magic, the swarm must succeed on a Constitution saving throw against the caster's spell save DC or fall unconscious for 1 minute.

False Appearance. While the swarm is motionless, it is indistinguishable from a pile of books.

Swarm. The swarm can occupy another creature's space and vice versa, and the swarm can move through any opening large enough for a Tiny creature. The swarm can't regain hit points or gain temporary hit points.

Slash. Melee Weapon Attack: +3 to hit, reach 0 ft., one target in the swarm's space. Hit: 8 (2d6 + 1) slashing damage, or 4 (1d6 + 1) slashing damage if the swarm has half of its hit points or fewer.