Like most Magic: The Gathering cards, the value of Rift depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Mystery Booster Playtest Cards 2019)
Youll want to throw this card into Commander decks that live or die by their activated abilities, like Feldon of the Third Path or Brion Stoutarm
He plans to host tournaments, food truck nights and other events to make it more than just a collector shop
But for most of the part it will be quickly forgotten and drop in price heavily
Playing Winter Orb with Urza, Lord High Artificer is a game plan
Even with myriad you're still only getting a temporary advantage, so you should make sure you either borrow something that's going to leave a mark, or lean on sacrifice effects to circumvent giving the creature back