Advanced format ruling
Aegis of the Ocean Dragon Lord
Card effect (current official text)Until the End Phase, face-up Level 3 or lower WATER monsters you control cannot be destroyed by battle or by card effects.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.