You have mastered a deadly fighting form inspired by the hideous attacks of the barbed devil.
Benefit: Your unarmed attacks can deal either bludgeoning or piercing damage. You decide which type of damage you deal whenever you attack a foe, but you may only choose one type at a time. If you critically hit a foe with your unarmed strike while doing piercing damage, the additional pain caused by the strike causes the foe to become sickened for 1 round (or staggered for 1 round if the target is already sickened). Multiple critical hits in a round against a single foe do not increase the duration of the sickened or staggered condition.
Special: Hamatulatsu may be selected as a substitute bonus feat at 6th level by a monk even if the monk does not otherwise meet the prerequisites. This fighting style is normally only taught to women of a specific fighting school.
Note If using the optional Stamina Pool rules, the following trick may be used with this feat.
Pathfinder Campaign Setting: The Inner Sea World Guide. © 2011, Paizo Publishing, LLC; Authors: Keith Baker, Wolfgang Baur, Clinton J. Boomer, Jason Bulmahn, Joshua J. Frost, Ed Greenwood, Stephen S. Greer, Jeff Grubb, James Jacobs, Michael Kortes, Tito Leati, Mike McArtor, Rob McCreary, Erik Mona, Jason Eric Nelson, Jeff Quick, Sean K Reynolds, F. Wesley Schneider, Leandra Christine Schneider, David Schwartz, Amber E. Scott, Stan!, Owen K.C. Stephens, Todd Stewart, James L. Sutter, Greg A. Vaughan, Jeremy Walker, and JD Wiker.