Zarak

Zarak carries a potion of invisibility.

Zarak makes two Dagger attacks.

Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 5 (1d4 + 3) piercing damage, plus an extra 5 (2d4) piercing damage if the target is a creature and Zarak has at least 18 hit points.

Melee Weapon Attack: +5 to hit, reach 5 ft., one Humanoid. Hit: 8 (2d4 + 3) slashing damage, and the target is grappled (escape DC 11). Until this grapple ends, the target takes 8 (2d4 + 3) slashing damage at the start of each of its turns, and Zarak can't grapple another creature or use Assassin's Whim.

Zarak takes the Dash, Disengage, or Hide action.

Zarak halves the damage he takes from an attack made against him, provided he can see the attacker.