Emarkul, Death bringer

Indestructible, flying, annihilator 6, trample, protection from spells.

Take another turn after this one.

When Emarkul, Death bringer enters the battlefield bring 3 instants and/or sorcery spells from your library to your hand.

As long as Emarkul is on the battlefield cast cards from anywhere without playing their mana cost as many times as you want.