The attacks from the protagonists in the large ritual chambers were effective. However, the albino priest could be seen just entering this same chambers through teleportation. Furthermore, the dead all arose from their demise as if from some strange, powerful magic. Didn't matter if their bodies were reduced to a fine, bloody, mist. New problems would arise as every time they would be slain, they would come back from the dead stronger, tougher, and faster than they were before. Furthermore, these problems for our protagonists would be exponentially worse through the Cult's power to resist the magic and abilities of their enemies.
The albino priest laughed, as if in retort, and the PC's would find themselves temporarily stunned, only momentarily, and perhaps somewhat confused.
@ England
Against any logic, the reaping scythe would only kill, but not permanently get rid of the assembly of madness. James Frampton would conjure fire balls from his finger tips, and launch them, hoping to incinerate his targets into nothingness, only for them to reassemble before his eyes.
All of these attacks would fall on the deaf ears of the Universe. As soon as any assault opened against Merlin/Thomas Young, he would snap his fingers, as he rolled his eyes, and disappeared, leaving the King's eyes to suddenly turn pure white, with no pupils, and then shine a flash of red. The descendent of Arthur pulled his sword from the scabbard, and charged towards his targets, hoping to behead, or somehow murder anyone foolish enough to get in his way.