Cursed Treasure

Cursed Treasure enters the battlefield with X +1/+1 counters on it.
When Cursed Treasure dies create X colorless Treasure artifact tokens with, "Sacrifice this artifact: Add one mana of any color to your mana pool."
{w}{b}{t}, Remove a +1/+1 counter from cursed Treasure: create two 1/1 white Spirit creature tokens with flying.