Rogue: Sneak Attack

When your enemy can't properly defend itself, you take advantage to deal extra damage. If you Strike a creature that has the off-guard condition with an agile or finesse melee weapon, an agile or finesse unarmed attack, a ranged weapon attack, or a ranged unarmed attack, you deal an extra 1d6 precision damage.

As your rogue level increases, so does the number of damage dice for your sneak attack. Increase the number of dice by one at 5th, 11th, and 17th levels.