The cultist Xander had defeated inside the last Death Nightmare had transformed into a ghoul after death, but this one was using a dark spell to hold his body together. The Corrupted Resurrection card he had just played had brought him back to life with a body that acted as a connected whole even with the different parts being severed.
Xander could keep on slicing the limbs, but they were always going to crawl back to the main body. And what was most shocking was that the cultist's bodily functions didn't stop even with his head being chopped off. Xander wondered if he was facing another undead abomination or if this cultist still retained his self-awareness.
From the way the cultist was speaking, it didn't seem like he had lost his sentience or was being controlled by someone else. And that could only mean one thing. His body was being held together by the threads of corruption due to which he could keep going even if he was critically wounded.