flashback cards mtg Rules Text: Flashback, Colors: Black, 29 Each instant and sorcery card in your graveyard gains flashback until end of turn Flashback - Secrets of Strixhaven

Yes, not being able to control the outcome is bad, but youll either get tokens, deal direct damage, or even use its activated ability twice more, and thats on a 4-mana card

Bloodstained Mire (Retro Frame) The fan-favorite retro frame treatment can be found on 58 Modern Horizons 3 cards (7 commons, 16 uncommons, 26 rares, and 9 mythic rares) and 16 select reprints from Modern Horizons and Modern Horizons 2 with the H2R set code (2 commons, 6 uncommons, 2 rares, and 6 mythic rares)

You can find details on the redemption program here

Could it win you games from your Mystery Booster 2 draft, absolutely, but including it in other decks is more of a flavor choice