Avyavastha

Legendary Resistance (3/Day, or 4/Day if within 30 feet of Magical Deck). If Avyavastha fails a saving throw, it can choose to succeed instead.

Multiattack. Avyavastha makes three Tendril attacks. It can replace any number of attacks with a use of Draw of Chaos.

Tendril. Melee Attack Roll: +10, reach 15 ft. Hit: 11 (2d6 + 5) Slashing damage plus 5 (1d8) Necrotic damage.

Draw of Chaos. Avyasatha chooses between Spades, Clubs, and  Diamonds, then draws a random card from the associated suit. The effects of the card begin immediately after the draw. Card Effects can be found on the Dealer Class: Level 14: Deck of Madness.  

Manipulated Chaos (1/Each Day). Avyasatha searches through the Magical Deck and selects one card, which will come into affect once selected. Card Effects can be found on the Dealer Class: Level 14: Deck of Madness.  

Spellcasting. If Avyavastha casts a spell, he uses Charisma as the spellcasting ability (spell save DC 21, +11 to hit with spell attacks):

Provoked Insanity. Avyavastha may cast of the following Spells: Counterspell (6th Level), Shield (1st Level), or Silvery Barbs (1st Level). If Avyavastha casts one of these Spells, he must draw a Heart Card at random. The effects of the card begin immediately after the draw. Card Effects can be found on the Dealer Class: Level 14: Deck of Madness.  

Legendary Action Uses: 3 (4 if within 30 feet of Magical Deck). Immediately after another creature's turn , Avyavastha can expend a use to take one of the following actions. Avyavastha regains all expended uses at the start of each its turns.

Draw of Chaos. Avyasatha chooses between Spades, Clubs, and  Diamonds, then draws a random card from the associated suit. The effects of the card begin immediately after the draw. Card Effects can be found on the Dealer Class: Level 14: Deck of Madness.  

Deal of Chaos. Avyasatha gives a creature within 60 feet a Heart or Red Joker card which is selected at random. The effects of the card begin immediately after the card is given. Card Effects can be found on the Dealer Class: Level 14: Deck of Madness and the Table of Chaos. 

Tendril. Avyavastha can move up to half his Speed, and it makes one Tendril attack. This movement cannot provoke Attacks of Opportunity.

Chaotic Movement. Avyavastha can teleport up to 30 feet in a random direct.