Vondal Bloodstone, the Forsaken

Innate Spellcasting: Vondal can cast the following spell without the components from Xanathar's guide:                                                                                                                              At will: Chaos Bolt

Bloodied:  The only way to come back to his other form is to take 15 necrotic damage. 

Durthane: Durthane becomes a Skeleton Warrior when Vondal transforms.

Magic Aura: At all times in a 10ft circle with Vondal as the center, the Cause Fear (DC 14 Cha. Saving throw) spell is all around Vondal on his turn. 

Multiattack: Vondal can attack twice with Bloodhead, or once with one of his spells. 

Bloodhead: Melee weapon attack: +6, reach 5ft., one target: HIt: 10 (2d6 + 3) slashing plus 3 (1d6) necrotic damage. Whenever Vondal kills a creature with one or more heads, he decapitates it. He can use his bonus action to launch the head up to 60ft. away.