
Dreadhound | Creature | Demon Dog | When Dreadhound enters, mill three cards. (Put the top three cards of your library into your graveyard.)
Whenever a creature dies or a creature card is put into a graveyard from a library, each opponent loses 1 life. | Joe Slucher

Dinrova Horror | Creature | Horror | When Dinrova Horror enters, return target permanent to its owner's hand, then that player discards a card. | Johann Bodin

Swift Warkite | Creature | Dragon | Flying
When Swift Warkite enters, you may put a creature card with mana value 3 or less from your hand or graveyard onto the battlefield. That creature gains haste. Return it to your hand at the beginning of the next end step. | Izzy