Magpie filch
rogue utility 16
Prerequisite: Thievery trained
Requirement: you must have a hand free.
Trigger: you hit a creature with a melee attack
Target: the triggering creature
Effect: "You take a small object from the target as if you had made a successful Thievery check to pick pocket."[MP:82]
Magpie filch is a daily power available to rogues at 16th level.