Curse of the Cabal

Target player sacrifices half the permanents he or
she controls, rounded down.
Suspend 2—{2}{b}{b}
At the beginning of each player's upkeep, if
Curse of the Cabal is suspended, that player may
sacrifice a permanent. If he or she does, put two
time counters on Curse of the Cabal.
"I am inevitable."
—Thanos