One or None

Imprint — , : You may exile an instant or sorcery card with mana value X from your hand. At the beginning of your upkeep, you may copy a card exiled with this artifact. If you do, you may cast the copy without paying its mana cost.

If this card is in your opening hand, you may begin the game with it on the battlefield. All nonland permanents are legendary.

Each other creature becomes a copy of target nonlegendary creature until end of turn.