Exterminatus

{1}: Add one charge counter to Exterminatus.
{t}: Sacrifice 3 charge counters from
Exterminatus. Destroy all cards in play.
All players must discard their hands. Exile all indestructible cards. Cards destroyed by Exterminatus can't be regenerated.
All players must put top 20 cards from their
library into the graveyard. All players lose 10 life.