When you cast this spell, you touch one building of up to 30 feet long by 30 feet wide and up to two stories tall. Tenfoot-long legs resembling the creature whose bones you used as a material component (or chicken legs, if you cast this spell without components) sprout under the building, and the building gains a walking speed of 40 feet. The building can stand up or sit down as an action, and it must sit down to lower its doorways to ground level.   For the duration of the spell, the building becomes a Construct that follows your verbal commands and acts immediately after your turn in initiative. The building can stomp its legs, making a melee weapon attack using your spell attack bonus; on a hit it deals 3d10 bludgeoning damage. The building has AC 15, 100 hit points, and immunity to poison and psychic damage. It uses your saving throw bonuses. If the building is reduced to 0 hit points, the spell ends and it settles to the ground.   When you cast the spell, any unwilling creatures in the building that aren’t incapacitated can make a Charisma saving throw; if any of them succeed, the spell fails and has no effect.