D&D4 Wiki
Unbalancing shot
rogue attack 1

Requirement: wielding a crossbow, light thrown weapon, or sling

Target: one creature

Attack: Dexterity vs. AC

Hit: "2[W] + Dexterity modifier damage, and the target is slowed until the end of your next turn."[MP:74]

Unbalancing shot is an encounter power available to rogues at 1st level.