Azurel Knight of the blackened heart

If Azurel drops to 10hp a fiendish hand will emerge from the ground casting true polymorph turning her into a black dragon

Multiattack. 3 actions

Flame Tongue. +7 to hit, (2d6) slashing dmg. once the sword is activated it deals an extra (1d10) fire dmg.

Dreadful Aspect (Recharges after a Short or Long Rest). Each enemy within 30 feet of the blackguard must succeed on a DC 13 Wisdom saving throw or be frightened of the blackguard for 1 minute. If a frightened target ends its turn more than 30 feet away from the blackguard, the target can repeat the saving throw, ending the effect on itself on a success.

Spellcasting. The blackguard casts one of the following spells, using Charisma as the spellcasting ability (spell save DC 13):

2/day each: Command, Dispel Magic, Firebolt

Fly. Equipped with demonic sings Azurel may use an action to fly up to 60ft

Smite. Immediately after the blackguard hits a target with an attack roll, the blackguard can force that target to make a DC 13 Constitution saving throw. On a failed save, the target suffers one of the following effects of the blackguard’s choice:

Blind. The target is blinded for 1 minute. The blinded target can repeat the save at the end of each of its turns, ending the effect on itself on a success.

Shove. The target is pushed up to 10 feet away and knocked prone.

Legendary Resistance (3/Day). If Azurel fails a saving throw, she can choose to succeed instead.

Counterspell. Azurel can cast counter spell twice a day

Spectral Chaos. (Recharge 5–6).  Azurel conjures a torrent of flying, spectral demons that fill a 120-foot cone and pass through all creatures in that area before dissipating. Each creature in that area must make a DC 22 Constitution saving throw. On a failed save, the creature takes 36 (8d8) necrotic damage and is frightened of her for 1 minute. On a successful save, the creature takes half as much damage and isn’t frightened. A frightened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Hellish Storm. Azurel opens a rift that expands by 100ft in the sky filling the air with acid rain. creatures in the area must make a DC 25 Constitution saving throw or take (5d10) acid damage. on a save they take half as much.