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Audacious strike
rogue attack 17

Requirement: wielding a light blade.

Target: one creature
Effect: Before the attack, you can move 4 squares.

Attack: Dexterity vs. AC

Hit: "3[W] + Dexterity modifier damage. If the target attacks you before the start of your next turn, you can attack it again as an immediate interrupt and deal 2[W] + Dexterity modifier damage if you hit."
Effect: You can shift 2 squares.[MP:82]

Audacious strike is an encounter power available to rogues at 17th level.