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Sure, if you lose the flip, you're basically down a permanent, but you can circumvent that a bit by weaving this into a deck that actively wants to sacrifice permanents
Pokemon TCG Pocket Would Kill Two Birds With One Stone With More Duplicate Value Pack points in Pokemon TCG Pocket are hard to come by because they are only obtained 5 at a time when opening a booster pack, and they only apply to that specific set instead of being shared for all sets in a given account
Then, assuming you can enable the void ability, creating a 2/2 every turn is an obscene ability that lets you run away with the game very quickly
Sorin blends traditional Vampire lore, and Magic 's own Universes-Within lore, into the best combination, tying Vampires, Planeswalkers, and Magic into the perfect blend
While Yuna doesn't give the card draw that makes these decks run so well, she offers enough other abilities to make her one to consider