I started testing this idea, but suddenly I faces a guy who was playing the same deck, at least that what I thought until I realized He was doing it two or three times better than mine.The real key of the deck is Archfiend's Oath. A card that never saw the light of the competitive game until lavalval chain was release.
Al, Archfiend's Oath makes a huge combo with Plagespreader zombie and Malicious. You just put Malicious on top due to Plaguespreader effect and then, you only need to name any card and Malicious will hit the grave.
I will leave you now with the duel we had. Sadly the Audio is in Spanish, but I the most important things have been said on this post already.