Veiled missile
rogue attack 13
ranged weapon
Requirement: wielding a crossbow, a light blade, or a sling.
Target: one creature
Attack: Dexterity vs. Reflex
Hit: "3[W] + Dexterity modifier damage. You gain concealment against the target until the end of your next turn."
Cunning Sneak: You can make a Stealth check to become hidden.[MP2:66]
Veiled missile is an encounter power available to rogues at 13th level.