Creo, Builder of worlds

Landwalk, Indestructible, TitanBlood
You may play lands from exile and your graveyard
Landfall— Whenever a land enters the battlefield
under your control, you get {e}{e} and you also put {s}{s} into your mana pool until end of turn.
{s}{e}{t}-: Exile all tapped lands you control and
then search your library for that many lands and
put them onto the battlefield.