Ulamog Swallower of Sin

+4: Put four 1/1 Eldrazi Scions onto the battlefield with "sacrifice add 1 to your mana pool"
-6: Target player exiles the top ten cards of his or her deck, until end of turn he or she can play one card exiled without paying its mana cost.
-20: Target player exiles all lands, planeswalkers, and all other permanents he or she controls you gain life equal to each card exiled this way.