The ruin has, rather recently, become inhabited by a very large Behir, though Draiss can slip past it without the slightest worry. Deep underneath the ancient building, he finds a rather impressive altar, stained with long-dried blood, which seems to be the origination source for the aura, which, as he examines it directly, he realizes is a<em>very</em>powerful Wish spell, that clearly went well above the 'standard' rules for a Wish, and thus, was divinely granted, albeit with a catch. He can't determine the true nature of the wish, but it seems that the sickness originated here, if the energy signatures are to be believed.