Hammer and Bolter S01 E10 Plague Song

When the Death Guard champion Morior Dermatis finds his warband's ambitions thwarted, the sorcerer Ephisis takes matters into his own hands and decides on a new approach. Realising that Grandfather Nurgle's gifts are not bound by mortal conceits of space and time, Ephisis plans to unleash a plague unlike any the Imperium has suffered before.