Sea Stealth II

This card's name becomes "Umi" while face-up on the field or in the GY. Your opponent cannot target WATER monsters you control with non-WATER monsters' effects. At the start of the Battle Phase: You can Special Summon 1 monster that specifically lists "Umi" in its text or 1 WATER Normal Monster from your hand or GY in Defense Position, but destroy it at the end of the Battle Phase. You can only use this effect of "Sea Stealth II" once per turn.