Bryn Shander's Town Hall
"As you wish, sir." Mallory wasn't surprised that Markham wouldn't want the items removed from his control but, at the same time, she was rather inwardly annoyed. It was going to take her some time to finish checking everything thoroughly and she'd rather have done it in the comfort of somewhere with good companions, warm hearth, and strong drink.
In the meantime, she moved along to examine the Wight's corpse. Thankfully it seemed the guards had shed her blanket and rope into a pile nearby when they'd chained it up, so she quickly recovered those with a quick flourish of cleaning magic to ensure they had no lingering Undead musk, then bundled them back to her satchel. When the guard arrived she offered him a polite nod of her head and gestured to the laid out remains. "Good evening, sir, come this way please. You too, Rhydd; one never knows when this sort of thing will come in handy. I'll spare you the extended lecture on the topic of Undead but, in short, their bodies are animated by necrotic energy. For lesser Undead like Skeletons and Zombies, the energy is spread throughout the entire form very thinly - just hit them hard enough and it disperses like a popped soap bubble. Greater Undead like Ghouls, Wights, Vampires, and the sort? They're trickier. The necrotic energy condenses into a single point somewhere within their body and must be removed lest it contaminate the area after their demise."
The young noble shook her hand about briskly to work away any stiffness from the cold then, with her fingers splayed out limp and totally relaxed, slowly began to sweep her hand up and down the length of the Wight's form from head to toe. "Necrotic energy is antithetical to living beings, so we sense it reflexively. Animals are especially keen at it. If you simply relax your hand and sweep across where the necrotic crystallization is, you'll feel your fingers begin to cramp." She swept across the body several times before, just as her palm crossed over its left bicep, her fingers slowly curled inward in an echo of rigor mortis. "Ah! There it is. Here, each of you try and see what it feels like yourselves." she invited the men to mimic her motions and feel the blood-chilling sensation of being so near to raw necrotic energy.
Once they had their turn at it one way or another, Mallory drew her field knife and made a careful incision over where she'd detected the welling of lingering energy. To cut into a withered Undead's flesh was both easier and more difficult than fresh in different ways - it was dry and brittle without any splash of blood, but toughened by exposure and cold like leather. But with enough wiggling of her knife she leveraged the gap open and reached in with gloved fingers to carefully tug free a tiny, matte black mass that looked akin to a naturally-formed mineral crystal. Barely any bigger than a coin. "There we are. Quite diminished; it seems as though Squire Kumalo's attack destroyed much of the necrotic essence in the body to begin with. All the better, really." she appraised the nasty little crystal in the light before she wrapped it in a spare bit of cloth for safe-keeping. "If you don't remove the necrotic essence from an Undead, it increases their chance of reanimation. Bury their corpse and the necrotic energy will seep into the surrounding earth, poisoning the plants and animals in short order, while also drawing more Undead to it. If you burn it? Half of Bryn Shander would come down with a heaving case of Crypt Lung before the week was out.
Once removed, the corpse can be disposed of by normal means safely, and the crystal itself can be destroyed by submerging it in a two-to-one ratio of holy water and high-proof alcohol, which will destroy the liquids and crystal alike. I'll see to it this is done away with myself."