Dark Timberground

Dark Timberwood enters the battlefield tapped.
{t}: Add {b} to your mana pool.
Beguile {2}{b} (If this card is untapped, when a creature attacks you or a planeswalker you control, you may pay {2}{b}. If you do, attach this card to that creature's controller. It becomes an aura curse.)
If this card is attached to a player, it looses "{t}: Add {b} to your mana pool." and gains "Creatures enchanted player controls get -1/-1."