Can the Air Barrier Hex from the Wind Shaman only be used a handful of times in the Shaman's career, or can it be used all day with no limitation (i.e. The barrier expires, so the Shaman immediately uses a standard action to put it back up)? It reads:
"Air Barrier (Su): The shaman creates an invisible shell of air that grants her a +4 armor bonus to AC. At 7th level and every 4 levels thereafter, this bonus increases by 2. At 13th level, this barrier causes incoming arrows, rays, and other ranged attacks requiring an attack roll against her to suffer a 50% miss chance. The shaman can use this barrier for 1 hour per shaman level. This duration does not need to be consecutive, but it must be spent in 1-hour increments."
There seems to be a RAW/RAI conflict with the exclusion of "per day" or similar language, which the Wind Oracle's version includes.
