The easiest spot to farm the Siege Golem Prophecy in Last Epoch is located in Etendell, a waypoint in Thetima. The game will send you in this direction during the story to complete a side quest ...

You'll need to find Siege Golems to complete certain Prophecies in Last Epoch. Here's an easy farming spot to complete it in minutes. That being said, Diamond Matrons do spawn in Monoliths in ...