Toppling slash
rogue attack 13
Melee weapon
Requirement: wielding a light blade
Target: one creature
Attack: Dexterity vs. AC
Hit: "2[W] + Dexterity modifier damage, and you push the target 1 square and knock it prone."
Brutal Scoundrel: The attack deals extra damage equal to your Strength modifier, and you push the target 1 extra square.[MP:81]
Toppling slash is an encounter power available to rogues at 13th level.