The arcanist can protect herself from energy damage as a standard action by expending 1 point from her arcane reservoir. She must pick one energy type and gains resistance 10 against that energy type for 1 minute per arcanist level. This protection increases by 5 for every 5 levels the arcanist possesses (up to a maximum of 30 at 20th level).
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.