Spring the trap
rogue attack 7
Requirement: wielding a light blade
Target: each enemy in burst you can see
Attack: Dexterity vs. AC
Hit: "1[W] + Dexterity modifier damage, and you can shift 1 square.
Ruthless Ruffian: This power gains the rattling keyword."[MP:78]
Spring the trap is an encounter power available to rogues at 7th level.