Zalnil, Hollow Grafter

When you cast Zalnil, Hollow Grafter, you may pay X life. If you do, exile the top X cards of target opponent's library, then you lose X life.
Eldrazis you control have Ingest and Trample.
At the beginning of each opponent's upkeep, if they have more cards in exile than in their library, they lose the game.
{c}{c}, {t}: exile the top card of each opponent's library and the top 3 cards of your library.
A creation as ruinous as space itself.