Clockwork Archon 2014
CR 13 construct
Gargantuan construct, unaligned
The clockwork archon can carry up to six Medium or eight Small creatures inside its torso. Creatures inside the archon have total cover against attacks and other effects outside the archon. The two escape hatches sit in the torso and can each be opened as a bonus action, allowing creatures in or out of the archon.
The clockwork archon is immune to any spell or effect that would alter its form.
The clockwork archon has advantage on saving throws against spells and other magical effects.
The clockwork archon deals double damage to objects and structures.
Actions
The clockwork archon makes two attacks with its transforming weapon.
Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 29 (4d10 + 7) bludgeoning or slashing damage. As a bonus action, the archon can change its weapon from a sword to a hammer or vice versa, allowing it to change its damage between bludgeoning and slashing.
The clockwork archon unleashes a brilliant beam in a 90-foot line that is 10-feet wide. Each creature in that line must make a DC 17 Dexterity saving throw, taking 58 (13d8) radiant damage on a failed save, or half as much damage on a successful one.
Source: Tome of Beasts 2 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details