Reveal the top four cards of your library. You may put a creature card from among them onto the battlefield. It gains "At the beginning of your end step, return this creature to its owner's hand." Then put the rest of the cards revealed this way on the bottom of your library in any order.

Flash (You may cast this spell any time you could cast an instant.)

When Vedalken Aethermage enters, return target Sliver to its owner's hand.

Wizardcycling (, Discard this card: Search your library for a Wizard card, reveal it, put it into your hand, then shuffle.)