Five Stars Five Strikes
Do not stop moving simply because you have struck your target; let one strike blossom into five.
Grandmaster Training 17,000 gp
Utility Power Encounter (Move Action)
Effect: You move up to your speed. If your next melee attack this turn hits, roll four extra attack rolls (using the same modifier as the initial attack roll) and deal 1d8 extra damage to the creature you hit for each of the extra attack rolls that hits.
Published in Dragon Magazine 404.