Chaos

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

Multiattack. Chaos makes 4 Chaos Burst Attacks per round.

Chaos Burst. Ranged Melee Weapon Attack: +19 to hit, range 120 ft., one target. Hit: 23 (2d12 + 10) piercing damage plus 19 (3d12) force damage.

As a Bonus action at the beginning of every turn Chaos Rolls 1d8 the receives the following benefits from their Chaos Defense ability. 

1. Immunity to Piercing, Bludgeoning, Slashing Damage 
2. Immunity to Fire Damage 
3. Immunity to Lightning Damage 
4. Vulnerability to Cold Damage 
5. Immunity from being Restrained 
6. Immunity to Poison Damage 
7. Immunity to Thunder Damage 
8. Immunity to Force Damage 

At the DM's discretion the result can be accompanied by a physical manifestation so the players can ascertain Chaos' current Defense abilities. These abilities stay in affect until they change at the beginning of Chaos' next turn. They can de dispelled (DC 20) but that does not stop the new defenses from taking affect at the beginning of the next turn.

If Chaos is hit and damaged they may use  a reaction and roll again using their Chaos Defense and also gain the benefit of whatever they roll.

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 her turn.

Attack. Chaos makes one Chaos Burst Attack.