Agent X (18)

Reckless.  At the start of its turn, Agent X can gain advantage on all melee weapon attack rolls during that turn, but attack rolls against it have advantage until the start of its next turn.

Multiattack. Agent X can make two battle axe or dagger attacks, before or after each attack Agent X can teleport 10 feet. If Agent X attacks two different creatures on a turn, it can make a 3rd attack against a 3rd different creature. 

Battle Axe. Melee Weapon Attack: +11 to hit, reach 5 ft., 1 target. Hit: 14 (2d8 + 5) slashing damage plus 18 (4d8) force damage.

Dagger. Ranged Weapon Attack: +11 to hit, range 20/60 ft., 1 target. Hit: 10 (2d4 + 5) piercing damage plus 18 (4d8) force damage.

Thunder teleport (recharge 5-6).  When Agent X hits a creature with a melee attack roll once on its turn, it can forgo the damage of the attack and cast Thunder Step (cast at level 7). The creature hit with the attack roll is taken with it as part of the Thunder Step spell without being willing. The save DC for this spell is DC 19 Constitution saving throw.

Starlight step.  As a bonus action, Agent X can magically teleport up to 30 feet to an unoccupied space you can see. Agent X can use this trait a number of times equal to its proficiency bonus, and it regains all expended uses when it finishes a long rest. After teleporting, Agent X can then make a melee attack against a creature within 5 feet.

Temporal slam.  When a creature hits Agent X with a melee attack, it can use its reaction to force the attacker to make a DC 19 Charisma saving throw or be teleported to a location within 30 feet of Agent X that it can see and take 18 (4d8) force damage.