Avgadam the Molten

Legendary Resistance (5/Day). When Avgadam fails a Saving Throw, he can choose to succeed instead.

Blazing Aura. Any creature that ends its turn within 30 ft. of Avgadam takes 20 Fire damage and starts Burning for 3 turns, taking an extra 10 Fire damage per turn until fully submerged or dampened by water. 

Burning Body. A creature that hits Avgadam with a Melee Weapon Attack takes 15 Fire damage. Furthermore, creatures within 10 ft. of Avgadam are Vulnerable to Fire damage.

Highly Reactive. Avgadam can take one Reaction on every turn of combat and has 3 Bonus Actions on his turn. 

Multiattack. Avgadam makes five Sword of Searing Flame or Scorching Blast attacks in any combination of his choice followed by one use of Molten Burst or Magma Ball (if available). 

Sword of Searing Flame. Melee Weapon Attack: +19 to hit, reach 10 ft., one target within range. Hit: 40 Slashing damage and 40 Fire damage.

Scorching Blast. Ranged Weapon Attack: +19 to hit, reach 120 ft., one target within range. Hit: 70 Fire damage and the target is pushed up to 15 ft. back.

Molten Burst. DC 26 Dexterity Saving Throw: All creatures within an 80 ft. cone originating from Avgadam. Fail: 80 Fire damage. Success: Half damage only.

Magma Ball (Recharge 5-6). DC 26 Dexterity Saving Throw: All creatures in a 30 ft. Emanation centered on a point within 120 ft. Fail: 100 Fire damage. Success: Half damage only. 

Step of Immolation. Avgadam teleports up to 60 ft. in any unoccupied space he can see. All creatures within 20 ft. of the space he left takes 20 Fire damage and is pushed 10 ft. back.

Heat Orb. Avgadam conjures a burning globe of heat on any 5 ft. square within 60 ft. Any creature that starts its turn within 20 ft. of the Heat Orb take 30 Fire damage. There is no limit to how many Heat Orbs Avgadam can conjure in this way. 

Fiery Eruption. When Avgadam is hit by an attack, all creatures within 50 ft. of him must succeed a DC 26 Dexterity Saving Throw or take 40 Fire damage. 

Incinerating Strike. When Avgadam is hit by a Melee Weapon Attack, he can immediately use his Sword of Searing Flame attack against that creature.

Legendary Action Uses: 3. Immediately after another creature's turn, Avgadam can expend a use to make use of the following abelites, regaining all expended uses at the start of each of his turns.

Volcanic Rebirth. Up to six creatures of Avgadam's choice within 80 ft. must succeed a DC 26 Dexterity Saving Throw or take 40 Bludgeoning damage, 40 Fire damage and be knocked Prone. 

Hellborn Ascension. Avgadam regains 30 Hit Points and teleports up to 60 ft. in an unoccupied space he can see. 

Infernal Gaze. Avgadam stares intensely at a creature he can see within 60 ft. That creature must succeed a DC 24 Wisdom Saving Throw or take 30 Fire damage and become Frightened for 1 turn.