Tæon, Ex Materia

When you cast this spell, target opponent exiles
the top four cards of their library, you may look
at and cast those cards for as long as they remain
exiled, and you may spend mana as though it
were mana of any type to cast them.
Annihilator 2 (Whenever this creature attacks, defending player sacrifices two permanents.)
"Nothing? There was never nothing..."