Painful shot
rogue attack 7
ranged weapon
Requirement: wielding a sling
Target: one creature
Attack: Dexterity vs. AC
Hit: "3[W] + Dexterity modifier damage.
Cunning Sneak: The target grants combat advantage to you until the end of your next turn."[MP2:63]
Painful shot is an encounter power available to rogues at 7th level.