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Gloaming cut
rogue attack 1

Requirement: wielding crossbow, light blade, or sling

Target: one creature

Attack: Dexterity vs. AC

Hit: "1[W] damage.
"Level 21: 2[W] damage."

Effect: "You shift a number of squares equal to your Intelligence modifier, and you can make a Stealth check to become hidden."[MP2:57]

Gloaming cut is an at-will power available to rogues at 1st level.