Rexaath, Elemental Conjuror

Whenever you cast an instant or sorcery spell,
you may exile the top card of your library.
If you do, you may play that card until the end
of your next turn.

Whenever you play a card from exile, create a
1/1 blue and red Elemental creature token.
"From the arcane currents, I weave both knowledge and minions."