Target player sacrifices half the permanents they control, rounded down.
Suspend 2 —
(Rather than cast this card from your hand, pay its suspend cost and exile it with two time counter(s) on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. If it's a creature, it has haste.)
At the beginning of each player's upkeep, if Curse of the Cabal is suspended, that player may sacrifice a permanent. If the player does, put two time counters on Curse of the Cabal.