This spell wreathes you in yellow or green acidic mist and causes Damage to each Creature that attacks you in melee. The flames also protect you from acid-based attacks.

Any Creature striking you with its body or a handheld weapon deals normal Damage, but at the same time the attacker takes 1d6 points of Damage + 1 point per Caster Level (maximum +15). This Damage is acid Damage. Creatures wielding melee Weapons with reach are not subject to this Damage if they attack you.

You take only half-damage from acid-based attacks.