Hunger of the Howlpack + Typhoid Rats + Undying Evil and Prey Upon should make the trick in the beginning.

Lumberknot and Skirsdag High Priest are finisher.

Removals and Festerhide Boar and Morkrut Banshee will help to trigger Morbid.

Devouring Swarm and Disciple of Griselbrand are sacrifiers with nice effects.