Curse of the Blood Rose

Enchant player.
Curse of the Blood Rose enters the battlefield
with 8 petal counters on it.
At the beginning of each upkeep, remove a petal counter from it.
When the last petal counter is removed from
Curse of the Blood Rose, sacrifice it. Enchanted
player sacrifices all creatures they control and
loses life equal to the number of creatures
sacrificed this way.