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Creatures within the wall are considered blinded and deafened, and must hold their breath or suffocate. Spells with verbal components cannot be cast in the wall, while any other spell requires a Concentration check (DC 20 + spell level). Creatures with sufficient reach can attempt to attack through the wall, but targets have total concealment and total cover, and the attacker must target the correct square.
Any unprotected flame placed inside the sand wall is immediately extinguished. You may only have one instance of this maneuver active at one time, ; a second use causes the first to end.
This maneuver is a supernatural ability.