The quest can be started at
lvl 19, but I advise just start at Level 20 because the new skills will
only be available at this level
This quest starts in the town of Gludio in the Warrior Guild with Master
Sorius. He has you go to the Ruins of Agony and hunt skeletons and
spartoi for 20 Topaz Pieces.
In the Ruins of Agony any of the skeletons or spartoi will work,
though the Tracker Skeleton Leaders and Raging Spartoi are aggro. When
you get 20 go back to Sorius.