Dolrothrum, Root of Genesis

{3}{b}{b}, Discard this card: Return another target horror creature from your graveyard to the battlefield.
{1}{w}, Discard this card: Horrors you control gain flying until end of turn.
{u}, Discard this card: Reveal the top card of your library. If its a horror put it into your hand.
Whenever a horror you control deals combat
damage to a player return Dolrothrum from your graveyard or exile to your hand.