Vespercoil Magnus

Multiattack. The Vespercoil Magnus makes three attacks: one Ram attack, one Cannon Volley, and one Wing Sweep.

Ram. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 36 (4d12+8) bludgeoning damage. If the target is a Medium or smaller creature, it is also knocked prone and pinned beneath the Magnus' battering prow (escape DC 21 Strength or Dexterity). A pinned creature is restrained and takes 14 (4d6) bludgeoning damage at the start of each of the Magnus' turns until freed.

Cannon Volley. Ranged Weapon Attack: +11 to hit, range 120/480 ft., one target. Hit: 45 (6d10+6) fire damage. On a hit, the target must succeed on a DC 20 Dexterity saving throw or catch fire, taking 14 (4d6) fire damage at the start of each of its turns. A creature can extinguish the flames by using an action to make a successful DC 10 Dexterity check to beat the fire; magical means also end it.

Wing Sweep. The Magnus unfurls its batlike fins in a 30-foot cone. Each creature in that cone must make a DC 20 Strength saving throw, taking 22 (4d8+6) bludgeoning damage and being pushed 15 feet on a failed save, or half as much damage and not pushed on a success. Objects not bolted down are toppled.

Grapnel Harpoon (Recharge 5-6). Ranged Weapon Attack: +11 to hit, range 60/240 ft., one target. Hit: 28 (4d8+6) piercing damage. If the target is a creature, it is grappled (escape DC 21). While grappled by the Magnus, the target is dragged up to 30 feet toward the Magnus on the Magnus' turns.

Steam Overdrive (Recharge 6). The Magnus vents superheated steam and overclocks its engines. Each hostile creature within 30 feet must make a DC 20 Constitution saving throw, taking 45 (10d8) fire damage on a failed save, or half as much on a success. Then the Magnus gains advantage on attack rolls and increases speed by 30 feet until the end of its next turn as systems surge.

Reactive Armor. When reduced to half its hit points or fewer, the Magnus grants itself +2 to AC until the start of its next turn by bracing armored plates and latching shields.

Roll. The Magnus moves up to half its speed without provoking opportunity attacks.

Gatling Burst. The Magnus makes a Cannon Volley attack against one target.

Smoke Barrage (2 Actions). The Magnus expels a choking cloud of steam and soot in a 15-foot radius centered on itself. Creatures in the area must succeed on a DC 20 Constitution saving throw or be blinded until the end of their next turn. The area is lightly obscured until the end of the Magnus' next turn.