The Abyss Golem, Ulgioth, attacked the reinforcements we sent to Prism Island Prairie. None survived.
You must eliminate that Golem and avenge our soldiers' deaths.
Gather a group of trustworthy warriors to vanquish the monster! You'll find it to the south of the eastern woods in Schilling Village.
After you've completed the mission, report to Royal Lieutenant Jessica.
Abyss Golem is a kind of conglomeration of Golems. It doesn't have a real body, so it will prove quite difficult to kill.
If the Golem tries to engulf you, you must try to evade it at all costs. Its mud can melt iron and steel.