Crimson Mecha-Drake

Traits

Heated Core. The internal furnace of the mecha-drake vents intense heat. A creature that touches the mecha-drake or hits it with a melee attack while within 5 feet of it takes 5 (1d10) fire damage.

Magic Resistance. The mecha-drake has advantage on saving throws against spells and other magical effects.

Unusual Nature. The mecha-drake doesn't require air, food, drink, or sleep.

Multiattack. The mecha-drake makes three attacks: one with its Bite and two with its Claws. It can replace its Bite attack with a Tail Blade attack.

Bite. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 17 (2d10 + 6) piercing damage plus 7 (2d6) fire damage.

Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 15 (2d8 + 6) slashing damage.

Tail Blade. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 19 (3d8 + 6) slashing damage. If the target is a creature, it must succeed on a DC 18 Strength saving throw or be knocked prone.

Plasma Breath (Recharge 5–6). The mecha-drake vents its core, exhaling a blast of superheated plasma in a 30-foot cone. Each creature in that area must make a DC 17 Dexterity saving throw, taking 45 (10d8) fire damage on a failed save, or half as much damage on a successful one.

Pinion Sweep (Recharge 6). The mecha-drake sweeps its metallic, bladed wings in a tight arc. Each creature within 10 feet of the mecha-drake must make a DC 18 Dexterity saving throw, taking 27 (6d8) slashing damage on a failed save, or half as much on a successful one.

Reactive Plating. When the mecha-drake is hit by a weapon attack, it can use its reaction to rapidly shift its segmented armor to brace for the impact, gaining a +3 bonus to its AC against that attack. If this causes the attack to miss, the attacker takes 5 (1d10) fire damage from sparks violently deflecting off the superheated metal.

The mecha-drake can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The mecha-drake regains spent legendary actions at the start of its turn.

• Strike. The mecha-drake makes one Claw or Tail Blade attack.

• Thruster Dash. The mecha-drake fires its wing thrusters, moving up to half its flying speed without provoking opportunity attacks.

• Venting Overload (Costs 2 Actions). The mecha-drake rapidly vents the excess heat from its arcane reactor. Each creature within 10 feet of the mecha-drake must succeed on a DC 17 Constitution saving throw or take 14 (4d6) fire damage and be pushed 10 feet away. On a successful save, a creature takes half as much damage and isn't pushed.