- Once per round, when you have combat advantage against an enemy and are using a weapon from the light blade, the crossbow, or the sling weapon group, an attack you make against that enemy deals extra damage if the attack hits. You decide whether to apply the extra damage after making the damage roll. As you advance in level, your extra damage increases. Level Sneak Attack Damage 1st–10th +2d6 11th–20th +3d6 21st–30th +5d6 - [[Yuki the Wraith]] - +2d8[*]([[Backstabber (feat)]])