Golos, Journeys End

Toxic 1(when this creature deals combat damage
to an opponent, give them a poison counter.)
When this enters the battlefield,
search your library for a land. Put it onto the battlefield tapped, shuffle your library.
{2}{p/w}{p/u}{p/b}{p/r}{p/g}: Exile the top three cards of your library. You may play them this turn without spending mana to cast them.