Wind Challenge (4e Power)

Wind Challenge	Samurai Class Feature
You take your Bushido stance and challenge your foes to an honorable duel.
4e Power Usage::At-Will, Martial
4e Power Action Type::Immediate Reaction	Personal
Trigger: You hit an enemy with a melee attack
Effect: You mark the target. The target remains marked until the end of your next turn. While a target is marked it takes a -2 penalty to attack rolls for any attack that doesn't include you as a target. In addition, whenever a marked enemy that is adjacent to you shifts or makes an attack that does not include you, you can make a melee basic attack against that enemy as an immediate interrupt.