Hushblade Legionary Pomponia entrusted you with an order from the Illusion Fortress. It involved finding a remedy to the increasing petrification of Scar Canyon. The scholar Sulla had requested help. Sulla asked you to help him find evidence to substantiate his theory. You travelled to Philon in the Scar Canyon. There you learned that the petrification is organically interconnected, like living creatures. Philon asked you to help him gather samples for research. You obtained samples as he requested, and brought them to Sulla. Sulla said that they were Petralith Fragments. They proved the theory he had arrived at based on his data. You have confirmed that the petrification does not spread, as Pomponia had feared. Everyone at the fortress was relieved to hear that, and Pomponia said you should see Brigade General Yulia.