Your rending claws expose your opponent’s vital organs to your teeth.
Benefit(s): If you deal damage to a creature with your rend ability, the critical threat range of your bite attack becomes 18–20 until the start of your next turn. This increase does not stack with other effects that increase your bite’s critical threat range (such as the keen weapon special ability or the Improved Critical feat).
Pathfinder Roleplaying Game Monster Codex © 2014, Paizo Inc.; Authors: Dennis Baker, Jesse Benner, Logan Bonner, Jason Bulmahn, Ross Byers, John Compton, Robert N. Emerson, Jonathan H. Keith, Dale C. McCoy, Jr., Mark Moreland, Tom Phillips, Stephen Radney-MacFarland, Sean K Reynolds, Thomas M. Reid, Patrick Renie, Mark Seifter, Tork Shaw, Neil Spicer, Owen K.C. Stephens, and Russ Taylor.