Zeckroth, End of Days

When Zeckroth, End of Days enters the battlefield, destroy all tokens and creatures with
power or toughness 2 or less that all opponents control.
At the beginning of each upkeep, each player sacrifices a permanent, if a player couldn't
sacrifice a permanent in this way, that player
loses the game.
If Zeckroth, End of Days leaves the battlefield in
any way, you lose the game.
Hexproof.