Bo'Brandalat Unleashed

Barbed and Bristling. When a creature within 5ft makes a melee attack against Bo, they must make a DC12 Dex save or take 1d6+4 piercing damage. 

Spellcasting. Bo'Brandalat is a 6th-level spellcaster. Its spellcasting ability is [Charisma] (spell save DC 15, +5 to hit with spell attacks). Bo has following [Warlock] spells prepared:
Cantrips (at will): [Eldritch Blast], [Frostbite], [Create Bonfire]
Spells (3 slots, cast at 3rd level): [Misty Step], [Darkness], [Hex], [Hellish Rebuke], [Enthrall], [Fear]

Multi-Attack. Bo can make 3 attacks from the options below, but may only select Eldritch Gaze once. He may attack once instead, and cast a levelled spell.

Left Claw Attack. Melee Weapon Attack: +13 to hit, reach 10 ft., 1 target. Hit: 16 (2d8 + 7) [Slashing] damage, + 2d8 Fire Damage. 

Right Claw Attack. Melee Weapon Attack: +13 to hit, reach 10 ft., 1 target. Hit: 16 (2d8 + 7) [Slashing] damage, + 2d8 Ice Damage. 

Eldritch Gaze. RangedWeapon Attack: +11 to hit, range 60/120 ft., up to 3 targets/blasts. Hit: 11 (1d10 + 5) [Force] damage.

Reaching grasp. You attempt to grapple a creature within 10ft. 

Backhand. When a creature hits with a melee attack against Bo, he may use his reaction to backhand them (use stats for one of the claw attacks, minus the elemental damage). In addition, they must make a strength saving throw of DC17, or be knocked backward 10ft. 

Horrific Visage. When a creature comes within 30ft of Bo, or is already within 30ft at the start of their turn, you can look at them and force them to make an Intelligence saving throw of DC17 or be frightened of you for 1min.

Legendary resistance (3/day) if you fail a saving throw, you may choose to succeed instead up to three times a long rest 

Bo has 3 actions to spend per round, and can do them at the end of any other creatures turn, or initiative count 20.

Demon Leap (Costs 1 Action). You leap up to 30ft in any direction. If a creature would get an opportunity attack on you, they have disadvantage.

Elemental Breath (Costs 1 Action). You breathe out a 30ft cone of either fire or ice. Creatures in that zone must make a DC16 Dex save, or take 4d8 fire or cold damage, or half as much on a success.

Abyssal healing (Costs 2 Actions). Your chest flares with deep red magic and you regain 4d6 hp. 

Evil takes Wing (Costs 3 Actions). Two huge dark spectral wings sprout from your back. You gain a flying speed of 60ft until the end of the round.