Broker for the Unseen

Pay 1 life: Add {b} to your mana pool. Masochist Occultist becomes a Shade Wizard until end of turn.
{b}{b}{b}{b}, {t}: Put a 4/3 black Shade token onto the battlefield, with "Creatures your opponents control get -1/-0". You can only activate this ability if Masochist Occultist is a Shade.