Prerequisite: 8th level, controller role
Benefit: You can exchange any 6th-level or higher utility power you know for forceful power.
Feat UtilityForceful Power
You knock those struck by your attack from their feet.
Free Action Personal
Trigger: You hit at least one creature with an area attack power
Effect: You knock prone each creature you hit with the triggering power.
Published in Dragon Magazine 382, page(s) 101.