This spell covers your hand with a writhing black aura. As part of casting the spell, you can make a melee touch attack that deals 2d6 points of negative energy damage and causes the target to be staggered for 1 round. If the attack is a critical hit, the target is staggered for 1 minute instead. Creatures immune to precision damage are immune to the staggered effect.
Pathfinder Roleplaying Game Advanced Class Guide © 2014, Paizo Inc.; Authors: Dennis Baker, Ross Byers, Jesse Benner, Savannah Broadway, Jason Bulmahn, Jim Groves, Tim Hitchcock, Tracy Hurley, Jonathan H. Keith, Will McCardell, Dale C. McCoy, Jr., Tom Phillips, Stephen Radney-MacFarland, Thomas M. Reid, Sean K Reynolds, Tork Shaw, Owen K.C. Stephens, and Russ Taylor.