Sharpening the Sword

First do the Father and Son quest and make sure to give the fishing pole back to the son. Then, after talking with Ailbeche again, head to Ordelle's Caves and look for a stalagmite around H-10 of the first level. This triggers the spawn of Polevik, an Earth Elemental. After you kill him, touch the stalagmite again to receive a key item.

Talk to Sobane in (D-6) of South San d'Oria. Then go back to Ailbeche for the Honor Sword.