The Cursed Rose

The Cursed Rose enters the battlefield with X
petal counters on it. During each players upkeep
remove a petal counter from The Cursed Rose.
When The Cursed Rose enters the battlefield
exile all creatures, enchantments, tokens and
planeswalkers with a curse counter on them.
When The Cursed Rose leaves the battlefield
return all exiled creatures, enchantments and
planeswalkers with a curse counter on them.
If there are no petal counters on The Cursed
Rose, sacrifice it.