He turned to his notes.
No sustained ritual or source - one instance of poison - presumably at several sources at the same time.
Makes corpses more suceptable to undeath. Thus poisoning affects soul? Probably. Yet bodies scarred...
Contains disease? Or just makes people more suceptable to diseases already present?
Time to find out more. On a hunch he split a sample, added something different to them all. Healing ingredients? No. Shattered Demon Essence? Nothing. Pure White Flower? Aha, a reaction. So that would serve as an indicator...
Pouring those samples away, he walked to a cupboard and looked at the bottles inside. There. He took a small bottle and drank, held his eyes closed and waited for it to take effect. After a short while, new paths opened up for him, a sixth sense that he had previously had but had lost - made almost painfully fine.
He found his largest remaining Arnad Guarhoth sample and began to sift throught the intricacies of magic within it. (Sense Power 5 on the poison).
After five minutes, with what notes he had, his magic sense began to fade and he began some divinations, carefully, making notes as he went.
He went out of the door of his suite and began to walk down the corridor - then he stopped. Walked to the reception of the nearest school and looked at the receptionist, glanced at his feet, pushed his glasses up his nose.
"Hello. I need to get a message to the quartermasters here in Dvarni. There's a matter of some great importance to discuss. Tell them that it concerns a threat to all of Dvarni. Also..." There was something else - what was it? "Oh yes. Tell them that it's Ancalimon y Festaer y Helanwe, the potion master here. And it's urgent."