Fey Engine

Found in the Garden of Graves. An intricate magical contraption of iron rods and wooden shafts, crossing and crisscrossing each other. At each intersection, a rune is stamped on wood and metal, and several of the larger joints are adorned with gemstones. At its top, the device comes to a pyramidal peak, with prongs holding a gleaming emerald. The device channeled eldritch energy from the Feywild to an unknown location.

The Heroes destroyed it, thus curing the undead troubles in the Garden of Graves.

Fey Engine

Tomb of Horrors ArchangelViper