yugioh continuous spell cards cannot be destroyed protect Continuous Spell Card Spell-Stopping Statute

However, this has a caveat

Boo Koo 7

this came before Clues and Treasure became staples that appear throughout Magic, which greatly increases the number of cards this spell can cast

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If it is a deck that moves the high level of the extra deck with the low level of the main deck, there are times when you don't mind the disadvantages, but against such a deck, destroying the high level cards in your hand is extremely meaningless in the first place