Automaton Type-W “Siege Wardens”

Rolling Assault. As a bonus action, the Siege Warden can fold into a wheel shape, increasing its speed to 60 ft. and gaining advantage on Strength checks to shove or overrun. It can unfold as a bonus action to deploy its weaponry.

Harmonic Fortress Shield. When deployed, the Warden projects a 20-foot-radius shimmering barrier. The barrier has 100 hit points. As long as it stands, the Warden gains +2 AC and advantage on saving throws against spells. Damage to the barrier does not affect the Warden until the shield is broken.

Siege Breaker. The Warden deals double damage to objects, structures, and siege equipment.

Radiant Core Overdrive. When the Warden falls below half its hit points, its cannons overheat, increasing their damage by 10 but granting advantage on attack rolls against it until the end of combat.

Multiattack. The Warden makes four Arcane Siege Cannon attacks.

Arcane Siege Cannon. Ranged Weapon Attack: +9 to hit, range 120/480 ft., one target. Hit: 21 (4d10) radiant damage.

Crushing Roll. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 27 (5d10) bludgeoning damage and the target must succeed on a DC 19 Strength saving throw or be knocked prone.

Harmonic Detonation (Recharge 5–6). The Warden releases a massive pulse of radiant-thunder energy. Each creature of its choice within 30 feet must make a DC 17 Constitution saving throw or take 45 (10d8) radiant damage and 22 (4d10) thunder damage and be pushed 20 feet away. On a success, the creature takes half as much and isn’t pushed.

Legendary Actions (3/round)

• Target Lock. The Warden designates a creature it can see. It gains advantage on its next cannon attack against that creature.

• Roll Advance. The Warden folds, moves up to half its rolling speed without provoking opportunity attacks, then can unfold again.

• Barrier Flare. The shield flares with radiant light. All hostile creatures within 20 ft. must succeed on a DC 15 Dex save or be blinded until the end of their next turn.