كايريو-شين - اللوياثان

While "Umi" is on the field, each player can only control 1 face-up non-WATER monster (if a player controls 2 or more face-up non-WATER monsters, they must send some to the GY so they control only 1). During your Main Phase: You can add 1 "Umi", 1 "Kairyu-Shin" Spell/Trap, or 1 "Sea Stealth" Spell/Trap from your Deck to your hand. You can only use this effect of "Kairyu-Shin - Leviathan" once per turn.