Dazing shot
rogue attack 17
ranged weapon
Requirement: wielding a sling.
Target: one creature
Attack: Dexterity vs. Fortitude
Hit: "2[W] + Dexterity modifier damage, and the target is dazed until the end of its next turn."
Cunning Sneak: If the target moves or attacks before the end of its next turn, it falls prone at the end of that action.[MP2:66]
Dazing shot is an encounter power available to rogues at 17th level.