Animated Bookshelf

Antimagic Susceptibility. The bookshelf is incapacitated while in the area of an antimagic field. If targeted by dispel magic, the bookshelf must succeed on a Constitution saving throw against the caster's spell save DC or fall unconscious for 1 minute.
Damage Transfer. While it is grappling a creature, the bookshelf takes only half the damage dealt to it, and the creature grappled by the bookshelf takes the other half.
False Appearance. While the bookshelf remains motionless, it is indistinguishable from a normal bookshelf.

Smother. Melee Weapon Attack: +5 to hit, reach 5 ft., one Medium or smaller creature. Hit: The creature is grappled (escape DC 13). Until this grapple ends, the target is restrained, blinded, and at risk of suffocating, and the bookshelf can't smother another target.

Ram.  Melee Weapon Attack: +5 to hit, reach 5 ft. one target.  Hit: 12 (2d8 + 4) bludgeoning damage