The arrow is only the first in a barrage that hinders your enemy's attacks.

Encounter   ✦     Martial, Weapon
Standard Action      Ranged weapon

Primary Target: One creature

Primary Attack: Dexterity vs. AC

Hit: 3[W] + Dexterity modifier damage. If the target makes an attack before the start of your next turn, make the secondary attack as an immediate interrupt against it.

  Secondary Attack: Dexterity vs. AC

  Hit: 1[W] + Dexterity modifier damage, and the target takes a penalty equal to your Wisdom modifier on the triggering attack roll.

Published in Dragon Magazine 383, page(s) 51.