Sneak attack

Type of Feat: Class

Prerequisite: Rogue 1

Specifics: Whenever a character makes a successful attack against an opponent who is flat-footed, cannot see them, or who is in combat with someone else, the characterâ€™s blow delivers extra damage. This extra damage is +1d6 at 1st level and an additional +1d6 every two levels thereafter. This extra damage is not multiplied in the case of a critical hit.

Use: Automatic. Monsters of the construct and undead types are immune to sneak attacks, as are any creatures that are immune to critical hits.