Dragonfire Core. At the start of each of its turns, Mark 2 gains one Dragonfire Charge, to a maximum of 8. It has 4 charges at the start of combat, and does not gain any additional charges until its second turn.

Fire Absorption. Whenever Mark 2 is subjected to fire damage, it takes no damage and instead regains a number of hit points equal to the damage dealt alongside 1 extra Dragonfire Charge per 10 damage, to a maximum of 3.

Immutable Form. Mark 2 is immune to any spell or effect that would alter its form.

Magic Resistance. Mark 2 has advantage on saving throws against spells and other magical effects.

Magic Weapons. Mark 2's weapon attacks are magical.

Multiattack. Mark 2 makes two greatsword attacks.

Greatsword. Melee Weapon Attack: +13 to hit, reach 5ft, one target. Hit: 20 (2d6 + 14) slashing damage.

Burning Bullet (Costs 1 Dragonfire Charge). Ranged Weapon Attack: +10 to hit, range 60/120ft, one target. Hit: 3 (1d6) piercing damage plus 11 (2d10) fire damage.

Fireball (Costs 3 Dragonfire Charges). range 150ft, each creature in a 20ft sphere must make a DEX saving throw, taking 28 (8d6) fire damage on a failure and half as much on a success.

Pillar of Flame (Costs 6 Dragonfire Charges). each creature in a 60ft line must make a DEX saving throw or take 56 (16d6) fire damage on a failure, and half as much on a success.

Dragonfire Overload. Mark 2 takes 16 (3d10) force damage and gains an additional two Dragonfire Charges.

Mark 2 can take 2 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. Mark 2 regains spent legendary actions at the start of its turn.

Greatsword. Mark 2 makes one greatsword attack.

Burning Bullet (Costs 1 Dragonfire Charge). Mark 2 makes one Burning Bullet attacks.

Fireball (Costs 2 Actions and 3 Dragonfire Charges). Mark 2 makes one Fireball attack.