It's also good on the turn you drop it
But it tends not to matter to people whether the card chewing away at their life and resources is Arcbound Ravager, Lantern of Insight or Chandra, Torch of Defiance
They are restricted too, so also only one copy can be in your deck
Jeskai Flashback is Mystic Intellect , with Sevinne, the Chronoclasm as the face commander
If you are sandwiching your card between a rigid material such as cardboard, taping all sides of the material will also help the card from sliding free while in the process of being mailed
There is the risk that some decks out there don't have any spells they won't be able to cast, but the loss in such a case is the mana required to make him work more than the opportunity cost of a larger creature