Tower Golem
Gargantuan construct, unaligned
Armor Class: 18 (natural armor)
Hit points: 325 (25d12+150)
Speed: 20 ft.
STR 26, DEX 8, CON 24, INT 3, WIS 12, CHA 1
Saving throws: STR +8, DEX -2, CON +7, INT -3, WIS +1, CHA -5
Damage immunities: poison, psychic, bludgeoning, piercing, slashing from nonmagical attacks not made with adamantine weapons or siege weapons.
Condition immunities: charmed, exhaustion, frightened, paralyzed, petrified, poisoned.
Senses: darkvision 120 ft., passive Perception 11
Languages: understands the languages of its creator but cant speak.
Challenge 20 (25000 XP)
Immutable Form: The golem is immune to any spell or effect that would alter its form.
Magic Resistance: The golem has advantage on saving throws against spells and other magical effects.
Magic Weapons: The golem's weapon attacks are magical.
Tower Form: As an action, the tower golem alters its configuration to become a tower. The golem becomes is a cylindrical tower, 30 feet in diameter and 50 feet high, with arrow slits on all sides and a battlement atop it complete with a magical ballistae. Its interior is divided into three floors, with a ladder running along one wall to connect them. The ladder ends at a trapdoor leading to the roof. When in this form, the tower has a small door allowing entry to the first floor. The door is immune to the knock spell and similar magic, such as that of a chime of opening.
Actions
Multiattack: The golem can make two melee attacks or one ballistae attack.
Slam: Melee Weapon Attack +14, Reach 10 ft., one target, Hit: 30 (4d10+8) bludgeoning damage.
Arcane Ballistae: Ranged Weapon Attack +8, Reach 120/480 ft., one target, Hit: 18 (3d10+2) piercing damage.
