Aspect of Gruumsh

Fog of War. At the start of each of his turns, the aspect can choose to generate a continuous cloud of arid black smoke that billows from his body in a 20-foot radius sphere. It's area is heavily obscured and moves with him.

When a creature enters the area for the first time on a turn or starts its turn there, that creature must succeed on a DC 25 Constitution saving throw or take 22 (5d8) poison damage. Creatures are affected even if they hold their breath or don't need to breathe.

Immutable Form. The aspect is immune to any spell or effect that would alter his form.

Legendary Resistance (3/Day). If the aspect fails a saving throw, he can choose to succeed instead.

Unusual Nature. The aspect is immune to disease and doesn't require air, food, drink or sleep.

Multiattack. The aspect makes four Bloodspear or three Stormstrike attacks. Two attacks can be replaced by a use of Spellcasting.

Bloodspear. Melee Weapon Attack: +18 to hit, reach 10 ft., one target. Hit: 21 (2d10 + 10) necrotic damage, plus 13 (2d12) acid damage. 

Stormstrike. Melee or Ranged Spell Attack: +16 to hit, reach 5 ft. or range 300 ft., one target. Hit: 38 (5d12 + 6) lightning damage, and the target has disadvantage on attack rolls and ability checks until the start of the aspect's next turn.

Spellcasting. The aspect casts one of the following spells, using Wisdom as the spellcasting ability (spell save DC 24):

At will: command, dispel magic, plane shift (self only)

3/day each: flame strike, circle of death

1/day each: storm of vengeance, power word kill

Aggressive. The aspect moves up to his speed toward an enemy that he can see.

Gruumsh's Wrath. Immediately after the aspect hits a target with the Bloodspear, he can force the target to suffer one of the following effects of the his choice:

1: Festering Wound. The target must succeed on a DC 25 Constitution saving throw or become poisoned. While poisoned in this way, the target can't regain hit points, and it takes 21 (6d6) necrotic damage at the start of each of its turns. The poisoned target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

2: Smite. The target takes an additional 27 (6d8) lightning damage. 

The aspect can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The aspect regains spent legendary actions at the start of his turn.

Teleport. The aspect magically teleports, alongside any equipment he is wearing or carrying, to an unoccupied space within 120 feet.

Shattering Earth (Costs 2 Actions). The aspect strikes the ground, triggering an intense earth tremor. All other creatures on the ground within 100 feet of the aspect must succeed on a DC 26 Strength saving throw or be knocked prone.

Divine Shield (Costs 3 Actions). The aspect creates a protective barrier around himself, gaining 20, temporary hit points.