You can conjure a seawater orb to protect yourself.
This feat can be applied only to spells with the water descriptor. You can modify the spell to surround you with a thin sheath of brackish salt water in addition to the spell’s normal effect. You gain DR/piercing equal to the spell’s level for 1 round after you finish casting the spell. After this round, the water collapses into a briny puddle and the effect ends.
MP Increase: None (a brackish spell spell does not cost any additional MP to cast.)