Harbinger of Insanity

Haste
Discard a card: Harbinger of Insanity gets +X/-1 until end of turn, where X is that card's converted mana cost.
Creature cards in your hand have madness {2}{b}{r}. (If you discard that card, discard it into exile. You may then cast it for its madness cost or put
it into your graveyard.)