Journey to Phyrexia

Journey to Phyrexia enters the battlefield tapped.
{t}: Add {b} or {g} to your mana pool.
{2}{t}: Add {b}{b}, {b}{g} or {g}{g} to your mana pool.
Whenever you tap Journey to Phyrexia for mana, target creature get`s -1/-1 until end
of turn.