Living Fortress

Animate a structure, vehicle, siege engine, room, bridge, gate, or mass of connected objects into a living fortress under your control. It can move up to 30 ft. on your turn, reshape openings, provide cover, carry creatures, and defend itself. Hostile creatures inside or adjacent to it must make a STR save when you command it to crush, shove, seal, or batter them, taking 55 (10d10) bludgeoning damage on a failed save, or half as much on a success.