Terness, Nightmare Incarnate

Flying, Flash
{u/b}, Discard a card: Target opponent discards a card. If it was a noncreature card, you may draw a card.
Discard three cards: Destroy target creature.
When you discard a card, you may cast it from your graveyard until the end of turn.
"Sanity is a curse. Madness offers the only freedom"