Very nice!

Now that everybody submitted his character sheet, we are ready to start. This is the starting situation I came up with:

Oanez and Tiberius are part of a quite mysterious diplomatic mission, sent by the Cornovian rex, Magnvs Qvartvs Artorivs, to the king of Brythonia; at the start of the campaign, they are on a ship sailing from Tintagol to the kingdom of the Pendragons. Meanwhile, a great Norse invasion of Wales is taking place, the likes of which haven't been seen since the times of Rhodri, which Halvar and his soldiers have joined. The Vikings, numbering in the thousands, under Gunnar, king of Manx, and supported by soldiers sent by his cousin Guðröðr of Sudreyjar, have landed near Ynys Môn, and have since moved southwards, pillaging large parts of Gwynedd and Dyfed, and is currently headed towards Powys, which is preparing to face the invasion. Cadell has been sent by his king to the south, to the fortress of Caersŵs, with a few hundred soldiers in order to help the castle's garrison to withstand the incoming assault.

However, I'd like to hear your ideas as well.

Also, here is a short list of NPCs which will play a role in the story. This list will be updated whenever a new character is introduced, so that everybody has a clear idea of who's who.

[b]Magnvs Qvartvs Artorivs, Rex Cornoviae:[/b] the young and recently crowned Rex of Cornovia. He is a part of a cadet branch of Magnus Artorius's (a.k.a. King Arthur) dynasty. He is known for his reputation of being a formidable fighter and a brilliant tactician and strategist, gained during a battle in which he humbled a much superior Dumnonian army. He is also described as a very attractive man, and his enemies like to say that he indulges in carnal pleasures a little too much for a king. 

[b]Cadwagan, Dvx Alae Artorii Invicti:[/b] the commander of the Ala Artorii Invicti, the Cornovian king's personal bodyguard and heavy cavalry retinue. Although he isn't seen very much in the Cornovian court, he is actually what some would call the king's right hand, and Magnvs puts a lot of trust in him. He is part of the mission in which Oanez and Tiberius are involved as well.

[b]Avitvs Tertivs, Sancte Pater Ecclesiae Mithrae Domini:[/b] the current head of the Holy Mithraic Church. Residing in Ravenna, in his church his role is equivalent to the Pope's for the Catholics. Like all the Holy Fathers before him, he obtained the title by defeating all his opponents in a ritual tournament after his predecessor's death. 

[b]Alwyn ap Glynn, King of Powys:[/b] the current king of Powys. Under his reign, the fortifications and castles built under Rhodri the Great were repaired and renovated, and many new ones were erected: this proved to be a wise choice, and now Powys is more well defended than ever. The king is known to be cynical, and terribly cruel with his enemies. 

[b]Peredyr:[/b] the second in command of the armies of Powys, and leader of Alwyn's personal bodyguard. Known to be a corageous and ruthless warrior, there are rumors saying that enmities between him and the king exist, although the reasons of this are not clear. He is currently at the head of Caersŵs garrison.

[b]Gunnar, Konung of Manx:[/b] the current king of Manx, feared raider and pirate. Under his reign, Manx has reached the peak of its reputation as a lair of pirates and pillagers. Gunnar even claimed for himself the title of King of Pirates, and currently seeks to expand his domains. He is known to be cunning and deceitful, both in warfare and in politics. Currently, he is camped with a large army near the border between Gwynedd and Powys, not far from Caersŵs.

[b]Erling[/b]: a warrior serving in Gunnar's army, and head of his húskarlar. Known to be terribly cruel and ruthless, he is regardless seen as a heroic figure by other Norse soldiers. Many Røkkatrú warriors serve under him, and some even say that he is part of the cult himself. He is currently following his king in his campaign in Wales

[b]Paul III, Rightful Shepherd of the Britons:[/b] the current head of the Pelagian College. Differently from the Catholic Church, the Pelagian one is headed by a College of cardinals, acting as a council and settling matters by voting, rather than referring to the authority of a Pope. However, the College elects a Rightful Shepherd, which acts as a spokesman or representative of sorts, and has the power to "tip the balance" when the College is evenly divided on an issue. Shepherd Paul is very old, and is known to be a saintly and pious man. Currently, he is residing in Berecingas together with the rest of the College.

[b]Alexander II Episcopvs Romae:[/b] the current Pope of the Catholic church.