hi if ran into a problem. I have finished fragments 3 armor breaking and made the sword and now the main quest is just stopped. I talk to the mage and she says go to one of the caves and to watch out. I go there and clear the entire thing. I am at a dead end and I'm confident to say i have talked to every person. I can't figure how to cross the border to dorgania too.

talk to darude infront of castle and buy tickets

After crafting the katryx blade, you have to go to the Drunken Cave in Begus and defeat Lace with the "armor breaking" skill Ryen has while the katryx blade is equipped.

You can't get into Dorgania until the main story is advanced far enough.