In
combat, a character can help a friend attack or defend by distracting or interfering with an opponent. If the character is in position to attack an opponent with which a friend of the character is engaged in melee
combat, the character can attempt to aid the friend as an
attack action. The character makes an
attack roll against
Defense 10. If the character succeeds, he or she doesn't actually
damage the opponent-but the character's friend gains either a +2 circumstance bonus against that opponent or a +2 circumstance bonus to
Defense against that opponent (aiding character's choice) on the friend's next turn.