Niya-Atha Sorcerer

Icy Wrath. Its weapons are imbued with icy magic. When it hits with any weapon deals + 4 (1d8) cold (included below). While enlarged it loses this bonus damage but AC increases to 16.

Reduce. If it starts its turn enlarged it can choose to end the effect and return to its normal size (no action required).

Multiattack. Three Scepter attacks or two Ice Shard attacks.

Scepter. Melee Weapon Attack: +3 to hit, 5 ft., one target, 4 (1d6+1) bludgeoning damage + 4 (1d8) cold if not enlarged or 8 (2d6+1) bludgeoning damage if enlarged.

Ice Shard. Ranged Spell Attack: +6 to hit 60/240' one target 9 (1d10+4) piercing damage + 9 (2d8) cold.

Summon Iceberg (Recharge 5-6). Chooses a point it can see within 120' of it. Each creature within a 20' of that point: 11 (2d10) bludgeoning damage and 7 (2d6) cold and is restrained until the end of its next turn (DC 14 Dex half damage and isn't restrained). Can't use this action while enlarged.

Enlarge. Magically increases in size along with anything it is wearing or carrying. While enlarged it is Large doubles its damage dice on weapon attacks (included above) and makes Str checks and Str saves with advantage. While enlarged it also can no longer use the Summon Iceberg action. If it lacks the room to become Large this action fails.