Ki Leech

Necromancy [evil]
Level: Artificer * 3, Cleric */Oracle * 3, Sorcerer */Wizard * 3, Warlock * 3
Components: V, S
Casting Time: 1 Standard Action
Range: personal
Target: you
Duration: 1 minute/level (D)
Saving Throw: -
Spell Resistance: -
  You place your spirit in a receptive state so when you confirm a critical hit against a living enemy or reduce a living enemy to 0 or fewer hit points, you can Steal some of that creature's ki. This replenishes 1 point of ki as long as you have at least 1 ki point in your ki pool. This does not allow you to exceed your ki pool's maximum. This ability does not stack with similar abilities (such as the Steal ki ability of the hungry ghost monk in the Advanced Player's Guide).
  This spell has no effect if you do not have a ki pool.