Ghorion was once one of the Three Troll Kings of the Cloudsteeth Mountains. Undeath has only made him crueler, and much, much more powerful.
They hop, they bleat. They shed their skins.
High above the lands of the living, where frost and howling of the wind reign, the morbid monument to a faith long dead calls the deceased on a last pilgrimage.
"Such a delirious monstrosity would never be allowed by the Unconquered Sun! It is the spawn of the hell-fiends sent to do their foul work! It and those that brought it into being must be destroyed!" - Lux Sialos, Knight of the Shining Crusade
The Eternals are one of the few races who survived the awakening of the Gods and the fall of Prime Creation. They were solitary, but powerful, weavers of essence and were locked in a bloody war with the Other Ones, another race which survived the Gods.
On a location with numerous webs, and at least one big spider, there is a something inside a cocoon. It is humanoid in shape, still moving. If the heroes free it (not before they kill or drive away the spiders), they meet a ... zombie!
The poor zombie wandered the dungeon alone, and tried to kill a big living creature (= a spider). The spider used the usual treatment, even if this victim did not look tasty. The zombie can be easily killed as any other zombie. It got but several doses of spider-poison, so can be something worth if it is extracted. You can mention to a druid or ranger the fact the spider had no poison anymore.