Mountain Thunder Crasher [Greater Style]

Heroic Tier
Prerequisite: Rogue, Ruthless Ruffian class feature, Mountain Thunder Student feat
Benefit: When you are attacking with a one-handed hammer, a one-handed flail, or a one-handed mace and you have proficiency with that weapon, you gain the following two benefits.
Whenever you hit an enemy with a martial power, that enemy takes a –2 penalty to saving throws until the end of your next turn against effects that daze or stun.
When you attack with a power associated with this feat, the power gains the rattling keyword.

Associated Powers: Fool's Opportunity, Knave’s Gambit, Pinning Blade, Setup Strike, Sheathe the Blade, Stab and Grab

Published in Martial Power 2, page(s) 122.