Master of All Lands (Su)

At 10th level, the horizon walker becomes familiar with and comfortable in all possible terrains. His terrain bonus in all favored terrains increases by +2, and he treats all other terrains as if they were favored terrains (+2 bonus). If a naturally occurring condition of temperature or weather requires a check or saving throw, he automatically succeeds. All allies within 60 feet of him gain a +2 bonus on these checks and saves; if the horizon walker is in a mastered terrain, this bonus increases to +4.