I'm guessing you have to wait until after you have built Thurston's fort to trigger quest to craft the Excalibam? I am currently at the Royal Defender quest which involves constructing a Ballista and gathering 60 Stout Knights. I am hoping after completing it i will trigger Thurstons fort.
Where can i find the mithril, beside dark cave adventure? I thought i've read it somewhere but i didn't remember on what thread.