Curse of Nihilus

When this card is played, target and enchant an opponent.
At the beginning of the enchanted player's turn,
they must pay 4 Vitality per Being or Creature
card they have on the field. If they do not pay for
a card, that Being or Creature card is destroyed.
When the enchanted player plays a Forceful
Being card from their hand, they must pay 4
Vitality or it is destroyed immediately.