Emrakul deciver of worlds

Flying Hexproof Indestructible Trample
At each end step secretly choose a player at the beginning of your upkeep deal 4 damage to that player.
{c}{c}{c}{t} Put top x cards of an opponents library into their graveyard untap 4 creatures.
Whenever a player puts cards from their library or takes damage draw a card.
The gods thaught the same thing, why?