I use leftover, play-grade sleeves for between one and three cards, and penny sleeves for four cards or more
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people who just want to put their card in a deck, they don't care so much as long as its sleeve-playable, as long as it's not destroyed or ugly. In some cases, its not even just actual Magic: The Gathering cards that are exciting fans
If damage that a source would deal to you can't be prevented, you still put an incarnation counter on Nine Lives