A lot of the most powerful new cards in Jumpstart are mythics as well which, combined with the themed booster scheme, has sparked justifiable concern about the total supply of these fresh staples
Then there's blue's connection to delve, flashback, and harmonize, all of which get cast or activated from the graveyard, so much that you might call this Diver a Driver because it's a key piece of mill and card advantage engines
Personally, while I wish this wasnt something that affects serialized cards, that aspect is a) unavoidable, and b) part of the high risk of playing Flip It
Great with the mobilize mechanic, as even if the tokens get blocked or die naturally, you get something for your effort
Fortunately, there are a handful of exceptions
If you end the turn, you keep the card hidden and surprise your opponent on your next turn