Darting around the celebration grounds are the Sugar Rush racers
Ideal for control decks , this flash creature effectively nullifies an opponent's turn, returning all nonland permanents to their hand that were played that turn
Whenever chaos ensues, you may put a creature card from your hand onto the battlefield
You are never forced to activate mana abilities to pay costs, so if there is a mandatory additional mana cost (such as from Thalia, Guardian of Thraben), you can decline to activate mana abilities to pay for it and hence fail to cast the suspended card, leaving it in exile
All this is to say, while people with big Reserved List collections will lose some value if the foil loophole is reinstated on the Gaea's Cradles and Gilded Drakes of the world, the impact is likely overblown, as the most expensive cards on the Reserved List are expensive because they are extremely rare and collectible, not because they haven't been reprinted