Zegavi, Chaos Incarnate

Flying.
When you cast Zegavi, Chaos Incarnate, each player shuffles all permanents they control into their library. Then, each player reveals cards from the top of their library equal to the cards they shuffled into their library this way, and puts all permanents revealed this way into play. Shuffle the rest of the revealed cards into their owners' libraries.
Whenever a player casts a spell, that player puts the cards in their hand on the bottom of their library in a random order, then draws that many c