Collector of Nameless Graves

Pay 1 life, {t}: Put the top card from your library
into your graveyard. Apply effects according the
type of the card:
•Land: You may exile target land card in your graveyard and add one mana of any color that
land could produce to your mana pool.
•Nonland Permanent: You may exile four cards
from your graveyard, you may cast a nonland card
from your graveyard spending mana as though it
were mana of any type to cast that spell.