It's in Nujelm cemetery
Had no idea about a city of Chaos, so started looking for clues in places I thought it might be, Magincia, Serpents Hold, Bucs Den. Finally found some Harpy [Guardian] at the Chaos gate in Ilshenar. Further in the city were even more Guardians, dragons, daemons and hell hounds.
On one hell hound I found this