Assassin

Fight! [2]
Enemies have the Sneak Attack ability
(1d6xHalf CCRL).
Sneak Attack (1/Turn)
The creature deals extra damage when it hits a
target with a melee attack and has advantage on
the attack roll, or when the target is within 5
feet of an ally of the creature that isn't
incapacitated and the creature doesn't have
disadvantage on the attack roll.