Whip Expert is a multiclass feat available to 8th level characters that have Whip Training. It is parallel with Acolyte Power. Similar to Acolyte Power, you can swap one 6rd-level or higher utility power you know for the whip crack attack power.[Dr368:67] Whip Crack Feat power Encounter (Special) Range: Requirement: You must be wielding a whip Effect: Until the start of your next turn, when an enemy within your reach takes an action that provokes opportunity attacks from adjacent enemies, it provokes an opportunity attack from you.