Kozilek, Fate Twister

This spell cannot be targeted.
When you cast Kozilek, each players' life totals
become 20, then exile each players' hands and graveyards, then exile all permanents.
When Kozilek enters the battlefield, each player
draws seven cards.
You have no maximum hand size.
Kozilek gets +2/+0 for each card in your hand.
If Kozilek would be put into a graveyard or exile
from anywhere, shuffle Kozilek, your graveyard,
and your exile into your library instead.