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Answer with Steel
Ranger Attack 13

You instantly attack when an enemy comes too close. you then quickly step away.

Melee weapon

Trigger: An enemy moves during its turn to a square adjacent to you

Target: The triggering enemy

Attack: Dexterity vs. AC

Hit: 2[W] + Dexterity modifier damage, and you shift 1 square.

Answer with Steel is an encounter power available to rangers at the 13th level.[MP2:39]