Having killed the ghoul, Malin dragged one half of the ghoul out of the array area with one hand, while Mr. Assistant Priest, accompanied by Shelton, began examining the drawing of the array.
Soon, he found the first mistake, "The inscription here is wrong, the combination of these letters created a problem, thus the array originally meant to summon spirits from the Spectral Plane became one summoning wraith-like spirits from the Corpse Plane, and you should really thank Mr. Malin, the gear he carries... must be the World Tree's sapling, which is extremely effective against the undead spirits."
In the end, Mr. Assistant Priest attributed the behavior of the undead to the little twig in Malin's hand, known as Fio.
Malin did not want to delve into what exactly made the lich and the afterwards ghouls dread him so much.
He found a tree stump to sit on, waiting for the next summoning ritual to take place.