Advanced format ruling
Hydro Pressure Cannon
Card effect (current official text)Equip only to a Level 3 or lower WATER monster. If it destroys an opponent's monster by battle, send 1 random card in your opponent's hand to the Graveyard.
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.