Set: Omen of the Ten (Unlimited)
Effect: Fanfare: Choose - Put an Infernal Crown or Descent into Madness into your hand.
The crow's domain is death and darkness. Drop by drop, the bright serum of life pools in its crown. That gleaming ichor can make dead men dance or drive the living to madness.
—Chapter 3, Encyclopedia of Demonic Harbingers
Life's bright ichor drips from the crown. Caught in the empty vessel of a dead man, it fills the void and makes him dance. But caught in the vessel of a living man, it floods the soul and drives him mad.
—Chapter 4, Encyclopedia of Demonic Harbingers