The boulders you hurl burn so hot that they smoke.
Prerequisite(s): Base attack bonus +11, heated rock special ability.
Benefit(s): When you throw a rock as part of an attack action and hit your target, you can cause the boulder to emit a 10-foot-radius spread of heavy smoke. The smoke lasts for 1d4 rounds. (See rules on smoke effects.)
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.