Avernus,Phyrexian God

Annihilator 10, trample, haste, protection from everything.
When Avernus,Phyrexian God enters the battlefield, destroy target land.
If Avernus,Phyrexian God would go into the graveyard, instead put it in the top three of
your library.
({p/r} can be paid with 2 life or {r}.{p/b} can be paid with 2 life or {b}.)