March 2015 Free Monster of the Month: Colossal Sorcerous Skull

From publisher blurb: Presenting the Colossal Sorcerous Skull an all-new free CR 13 monster for the Pathfinder Roleplaying Game. "A colossal sorcerous skull is the skull of a colossal creature—usually a titan or dragon—who sought immortality through undeath but lacked the power to convert their massive body, or simply wished to free themselves of its cumbersome bulk..."