Benefit: The alchemist learns how to preserve and protect his vital organs, reducing the chance of a mortal wound. When a critical hit or sneak attack is scored on the alchemist, there is a 25% chance that the critical hit or sneak attack is negated and damage is instead rolled normally.
Special: This does not stack with similar abilities that negate critical hits and sneak attacks (such as fortification armor). An alchemist can take this discovery up to three times; the effects stack, increasing this chance to 50% and then 75%.
Pathfinder Roleplaying Game: Ultimate Magic. © 2011, Paizo Publishing, LLC; Authors: Jason Bulmahn, Tim Hitchcock, Colin McComb, Rob McCreary, Jason Nelson, Stephen Radney-MacFarland, Sean K Reynolds, Owen K.C. Stephens, and Russ Taylor.