Mighty ki focus

Cost: 25 gp

Empowered Crit (When you score a critical hit with an empowered crit implement, the attack deals 1d10 extra damage. The extra damage increases to 2d10 at 11th level and 3d10 at 21st level.).
Unerring (You gain a +1 bonus to attack rolls against Reflex when attacking with an unerring implement.).

Ki focus (A ki focus is an implement that certain classes use as a focus for their inner magical energy, known as their ki. A ki focus might take the form of a training manual, a scroll of ancient secrets, or a blunt training weapon. To use a ki focus, you must first attune yourself to it. Some characters study their ki focus to attune themselves to it. Others meditate with it or wield it as they practice their fighting techniques. Once you have attuned yourself to a ki focus, you must either wear or hold it to use it as an implement.).

Published in Psionic Power, page(s) 151, Mordenkainen's Magnificent Emporium, page(s) 40.