You slash out with one hand while the other reaches into your pack to grab exactly what you need.

At-Will   ✦     Martial, Weapon
Standard Action      Melee or Ranged weapon

Prerequisite: You must be trained in Thievery

Target: One creature

Attack: Dexterity vs. AC

Hit: 1[W] + Dexterity modifier damage.
Level 21: 2[W] + Dexterity modifier damage.

Effect: You may draw a single item from a bag or pouch as a free action.

Published in Dragon Magazine 389.