Each Player Starts the game with an emblem that reads "You may pay the costs of spells you cast as if they have delve".

Fill up your graveyard and slam an early Colossal Dreadmaw or Vizzerdrix. Just because cards are usually bad doesn't mean they are in this cube, make sure you take into account the cost reduction but don't overload on too many big threats or you may not be able to mill enough cards to actually play them.