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Throat cut
rogue attack 29

Requirement: wielding a light blade.

Target: one creature from which you are hidden

Attack: Dexterity vs. Fortitude

Hit: "5[W] + Dexterity modifier damage, and ongoing 15 damage (save ends)."

Miss: "Half damage, and ongoing 5 damage (save ends)."[MP2:71]

Throat cut is a daily power available to rogues at 29th level.