Cipher

Assassinate. During its first turn, Cipher has advantage on attack rolls against any creature that hasn't taken a turn. Any hit Cipher scores against a surprised creature is a critical hit.

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

Sneak Attack. Once per turn, Cipher deals an extra 14 (4d6) damage when he 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 Cipher that isn't incapacitated and Cipher doesn't have disadvantage on the attack roll.

Cunning Action. Ciphers quick thinking and agility allow him to move and act quickly. He can take a bonus action on each of his turns in combat. This action can be used only to take the Dash, Disengage, or Hide action.

Blindsense. Cipher is aware of the location of any hidden or invisible creature within 30 feet of him. 

Elusive. Cipher is so evasive that attackers rarely gain the upper hand against him. No attack roll has advantage against you while you aren't incapacitated.

Death Strike. Cipher is trained in dealing extremely lethal damage. When he attacks and hit a creature that is surprised, it must make a Constitution saving throw (DC 8 + 4 + 3 = 15). On a failed save, double the damage of his attack against the creature.

Multiattack. Cipher makes two attacks.

Dagger. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 4) piercing damage, and the target must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one.

Sniper rifle. Ranged Weapon Attack: +7 to hit, range 80/240 ft., one target. Hit: 14 (2d10 + 7) piercing damage.

Revolver. Ranged Weapon Attack: +7 to hit, range 40/120 ft., one target. Hit: 10 [rollable](2d8 + 4)

Quickdraw. When attacking twice in any other way then with their Revolver Cipher can as a bonus action do one attack with their revolver.

Uncanny Dodge. when an attacker that Cipher can see hits him with an attack, Cipher can use your reaction to halve the attack's damage against him.