Day of the Master

Ravenous #4.3 & #4.4
Released: 9 October 2019
The Decayed master doesn't appear much in this story, which is fine, because he had the spotlight last time, and he'd probably get crowded out by the Bruce, Missy, and War Master versions all appearing in the story already. However, this is definitively the end of the line for the Decayed Master, as he's given a new regeneration cycle and it's strongly implied that he becomes the Reborn Master.