date a bullet booster box Weiss Schwarz: Dont miss Date A Bullet which features Kurumi Tokisaki as the main character Weiss Schwarz - Date A

In something like a Vespiquen deck that interacts with the discard pile Unown is even stronger, because it discards itself for free

Their beauty, with a spectacular foil finish and extended alternate art, limited availability of just 12 per set, and extreme rarity (about 1 in every 72 booster packs) contribute to their high value

In a format like Commander that relies on specific cards, you can easily get it to your hand for use if that card is legendary

The spell will have all of its normal effects before being exiled

So I'd bet that we'll see the time travel mechanic again in Magic some day, when the setting makes sense