You can only activate 1 "Bottomless Lake of the Purified Waters" per turn. If this Set card is destroyed by a card effect: You can target 1 "Protector of the Water" monster from your Graveyard; add that target to your hand. This card is used to Ritual Summon any "Protector of the Water" Ritual Monster. You must also Tribute monsters from your hand or field whose total Levels equal the Level of that Ritual Monster or more. Then, apply this effect, depending on whose turn it is. ● Your turn: Draw 1 card. ● Your opponent's turn: The Ritual Summoned monster cannot be destroyed this turn.