seamantle
Class: mage : 8 druid : 8 cleric : 8
Domains: water
Damage Type: 8 to AC, 4 to reflex save
Syntax: cast CLASS seamantle

You surround yourself with column of water, or control currents of water you're already in, to shield yourself from harm. It is a powerful shield, yet maintaining it for long periods of time is nearly impossible even for an experienced caster.