The Birth of Yggdrasil

{2}{t}, Sacrifice a land. Untap all lands
you control, then put a Realm counter
on The Birth of Yggdrasil.
When The Birth of Yggdrasil has nine
Realm counters on it, you win the game.
"The vast worlds held within the
nine realms, lay atop the branches of Yggdrasil."