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Courage breaker
rogue attack 15

Requirement: wielding a crossbow, light blade, or sling

Target: one creature

Attack: Dexterity vs. AC

Hit: "4[W] + Dexterity modifier damage, and the target is slowed (save ends). Until the target is no longer slowed by this power, any enemy adjacent to the target takes a -2 penalty to attack rolls."[MP2:65]

Courage breaker is a daily power available to rogues at 15th level.