Avatar of Auros

Air Form. The avatar can enter a hostile creature's space and stop there. It can move through a space as narrow as 1 inch wide without squeezing.

Disperse. The avatar can use its bonus action to disperse itself, becoming nearly invisible, imposing disadvantage on all attacks made against it and granting it advantage on all attacks and Stealth checks until the start of its next turn.

Sneak Attack. Once per turn, the avatar deals an extra 14 (4d6) damage when it hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the avatar that isn't incapacitated and the avatar doesn't have disadvantage on the attack roll.

Multiattack. The avatar makes three melee attacks or two ranged attacks.

Lightning-Javelin. Melee or Ranged Weapon Attack: +8 to hit, reach 10 ft. or range 50/100 ft., one target. Hit: 14 (2d8 + 5) lightning damage.

Lightning Vortex (Recharge 5–6). Each creature in the avatar's space takes 15 (3d8 + 2) lightning damage. They must then make a DC 15 Strength saving throw. On a failure, the target is flung up 20 feet away from the avatar in a random direction and is knocked prone. If a thrown target strikes an object, such as a wall or floor, the target takes 3 (1d6) bludgeoning damage for every 10 feet it was thrown. If the target is thrown at another creature, that creature must succeed on a DC 15 Dexterity saving throw or take the same damage and be knocked prone.

If the saving throw is successful, the target isn't flung away or knocked prone.