Mists of Mourning

Hexproof
Whenever another Curse enters the battlefield
enchanting another player, create a token copy
of it attached to enchanted player.
At the beginning of enchanted player's end step,
if they have 9 or more Curses attached to them,
they lose half their life and sacrifice half the
permanents they control, rounded up each time.
"The mists are the greatest misfortune we could wish
upon anyone, and so we do." - Rema