Irmilondi's Basilisk

Giant monster w/ enchanted item
Named after the poor sap that discovered the creature and was killed by it.
It also killed a young man (and inspiring adventure) out of Stionhays
A group of soldiers from Vurbiogihin were sent to clear it out due to fears of it coming down from the hills. They were wiped out and nobody has brought up removing it since. Kind of an awkward topic.