My Mother King Arthur

Artoria: Arthur, my proud son, the glory of all Britain. As the Crown Prince of Camelot, you shall inherit all that I have: my throne, all my possessions, including but not limited to the Knights of the Round Table, my Holy Lance and Sword, the noble steeds of the Royal Stables, and all the treasures in the treasury.

Mordred: Mom, what about me? Ah, I see. My brother inherits everything from you, and I inherit everything from him. That's the happy end, right? So, when will you abdicate, Mom? How many tables will we have at the wedding? Can I use your scabbard as a surfboard?

Altria: Knight Mordred, I appoint you Earl of Glamorgan, and you must take up the post immediately!

Traveling to Arthurian Britain, Artorius faces only one question: a major traitor or a minor villain?