Master assassin. John wick has proficiency in improvised weapons and the damage die for them is a d8 and he scores a critical hit on a roll of 18, 19, or 20 with any weapon he uses.

Focus.  John Wick doesn’t suffer disadvantage on ranged attacks made within 5ft and He also can’t be surprised.

Commitment. If a creature misses John wick with an attack he gains advantage to hit them on his first attack against them.

Sheer Force Of Will. At the start of each of his turns, John Wick regains 1d10 hit points.

Expert killer. John Wick can use his bonus action to reload or study his enemy giving him advantage on his next attack against them.

Evasion. If John Wick is subjected to an effect that allows him to make a Dexterity saving throw to take only half damage, he instead takes no damage if he succeeds on the saving throw, and only half damage if he fails.

Unarmored Defense. While John Wick is wearing no armor and wielding no shield, his AC includes his Wisdom modifier.

Sharply Dressed. John Wick wears a suit which gives him +2 to AC and saving throws and resistance to bludgeoning, piercing and slashing damage.

Multiattack. John wick makes three weapon attacks.

Pistol. Ranged weapon attack: +8 to hit, range 400ft, one target. Hit: 11 (1d10+5) piercing damage (reload 15 rounds)

Sniper. Ranged weapon attack: +8 to hit, range 800ft, one target. Hit: 27 20(2d10+7) piercing damage (reload 20 rounds)

Improvised weapon. Melee or ranged weapon attack: +7 to hit, reach 5ft or range 20/60ft, one target. Hit: 9 (1d8+5 damage)

Reload. John Wick uses his bonus action to reload his pistol or sniper.

Study Enemy. John Wick studies his enemy giving him advantage on his next attack against them.

Uncanny dodge. John wick halves the damage that he takes from an attack that hits him. He doesn't have to be able to see the attacker to take this reaction.

John wick 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. John wick regains spent legendary actions at the start of its turn.

Gun shot. John Wick makes one pistol attack.

Mobile  John wick uses his movement without triggering an attack of opportunity 

Ever aware. John wick regains his reaction.