You cover yourself in coils of flame drawn from the Plane of Fire.
Prerequisite(s): Knowledge (planes) 3 ranks.
Benefit(s): As a standard action, you can shroud yourself in fire. Until the end of your turn, whenever a creature makes a successful melee attack against you, that creature takes a number of points of fire damage equal to 1d6 plus half your ranks in Knowledge (planes); attacks made using reach weapons ignore this effect. A creature can halve this fire damage with a successful Reflex save (DC = 10 + half your level + your Constitution modifier).
You can use this feat’s benefit a number of times per day equal to your ranks in Knowledge (planes). If you have at least 9 ranks in Knowledge (planes), activating this ability is a move action. If you have at least 15 ranks in Knowledge (planes), you can activate this ability as a move action or a swift action.
Pathfinder Roleplaying Game Planar Adventures © 2018, Paizo Inc.; Authors: Robert Brookes, John Compton, Paris Crenshaw, Eleanor Ferron, Thurston Hillman, James Jacobs, Isabelle Lee, Lyz Liddell, Ron Lundeen, Joe Pasini, Lacy Pellazar, Jessica Price, Mark Seifter, F. Wesley Schneider, Todd Stewart, James L. Sutter, and Linda Zayas-Palmer.