Hammer and Bolter (2021)

S1E10 Plague Song

After the Death Guard champion Morior Dermatis faces setbacks in his warband's goals, the sorcerer Ephisis steps in to take control with a fresh strategy. Understanding that the blessings of Grandfather Nurgle transcend the limits of human perception of space and time, Ephisis intends to unleash a devastating plague that will surpass any suffering the Imperium has ever experienced.