Started by an item drop,Bluish Sulfur. Drops from mobs in Roud Sulfur Works. Appears to have a low drop rate.

Este item dropa dos mobs da mina de enxofre. Chance bem baixa. ao clicar com botão direito você abre uma quest secreta.

If you are into housing, since Bluish Sulfur is a rare drop, instead of doing this daily you might want to do the repeatable quests this NPC offers you for either a table ([Manor] Marzana's Starpaved Table) or a chair ([Manor] Marzana's Starpaved Chair) for your manor.
If you don't see the quest, it's probably because you didn't do the quest "[Manor] A Father's Heart" yet.