Brick Ant Swarm

False Appearance. While the Brick Ant Swarm remains motionless and isn't moving, it is indistinguishable from a normal pile of bricks.

Brick Wall. The Brick Ant Swarm has a +1 bonus to its AC for each Brick ant within 5ft of it.

Ambush: The Brick Ant Swarm can make one Body Slam attack first regardless of the initiative order, it then must follow its initiative order as normal.

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

Body Slam. Melee Weapon Attack. +4 to hit, 5ft reach, one target, for 2d6+2 bludgeoning damage, or 1d6+1 if the Brick Ant Swarm is at half hit points (7) or less.