Poisonous Lich

Whenever a creature enters the battlefield under
your control, target creature an opponent
controls gets -1/-1 until end of turn.
Dark Pact {1}{b}{g} - (Exile this card from your
graveyard: Create a token that's a copy of it, except
it's an Enchantment with no mana cost, power, or toughness. Dark Pact only as a sorcery.)