Then exile it.) "Flashback [cost]" means "You may cast this card from your graveyard by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack." You must still follow any timing restrictions and permissions, including those based on the card's type
Monastery Siege is a really handy and flexible enchantment
How about Summoner's Bond, which also begins face-down but requires you to name two completely different creature cards
Please tell me if more info is required
Modern isnt that fast right now, but there could be a future where your deck plans on comboing off after leading a turn on a cantrip where Serum Visions being slower matters
Unfortunately everyone will immediately hate you since they were probably saving their important cards compared to the ones you were forcing them to discard prior, so brace for impact~ Throw the Sanitatrium in there for some card cycling that also synergizes beautifully with Waste Not
