Approach of the Dragon God

(You may cast a legendary sorcery only if you control
a legendary creature or planeswalker.)
If this spell was cast from your hand and you've
cast another spell named Approach of the Dragon
God this game, you win the game. Otherwise,
look at the top six cards of your library. You may
put a creature card from among them onto the battlefield. Put the rest on the bottom of your
library in any order.