Celestial Amber, the young platinum drake

Amphibious. The creature can breathe air and water.

Multiattack. The Creature makes two attacks: one with its bite and one with its claws.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 15 (1d10 + 5) piercing damage plus 4 (2d6) acid damage.

Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 11 (1d8 + 5) radiant damage.

Absorb light (Recharge 4–6). Amber inhales absorbing light in a 20ft radius around herself. This area becomes magical darkness and is heavily obscured. Amber and her allies are able to see inside the darkness. 

Spell-casting

Amber can learn spell casting taught by their masters. 

Cantrips

Vicious Mockery

As a bonus action Amber creates a blast of light. All enemies in the area of darkness must succeed on a charisma saving throw 15 or take 3d8 radiant damage, half as much on a successful save. This action reduces the size of the area of darkness by a radius of 5ft

As a reaction when an ally within 60ft loses more than half of their hit-points amber can release the light she absorbed. The light passes through the ally healing them for 4d8 hit-points. This effect dispels the area of darkness created by Amber