Seirenia asked you to do her a favor. See Anteros, collect an Ax of Silibaros from him, then deliver it to Seirenia.
Step 1. Collect the Ax of Silibaros from AnterosA Weaponsmithing Master residing in the Artisans Hall in Sanctum. He complains that today’s Daevas have no persistence and give up Weaponsmithing too easily..
Step 2. Deliver the Ax of Silibaros to SeireniaA scholar who studies the lands of Asmodae. She can be in the Library of the Sages.