Sneak Attack

You cannot use this ability with Heavy weapons.

Attack the target with a wielded weapon of your choice.
If you are dual-wielding, you may attack once with each wielded weapon instead.

If you hit and meet the conditions to do Sneak Attack damage, you deal extra damage.
Once you deal extra damage with Sneak Attack, you cannot deal extra damage with it again until the start of your next turn
(if you hit twice while dual wielding, only one hit deals extra damage)
(if you hit multiple targets, choose one to deal extra damage to).

To deal this extra damage, your target must be off guard,
or your target must be engaged by one of your allies,
and you cannot have disadvantage on your roll to hit.

(Things which cause an enemy to be off guard include:
you being hidden or concealed from them, including because they are blinded,
them being prone, grabbed, restrained, asleep, paralyzed, frozen, or petrified, or thinking you are their ally.)