Omega, Incarnate

Cumulative Upkeep: Each opponent discards
a card at random.
Indestructible, Hexproof, Flying
When Omega, Incarnate enters play, each
opponent loses half their life, rounded down.
Omega, Incarnate's power and toughness is equal
to your current health points.
When there are no more cards for opponent(s) to discard, exile all permanents other than Alpha, Incarnate. Exile all cards in all opponent(s)
libraries except for the bottom card.