Ro'Arthian was a Great Mage that refused to die and reincarnated as an Ancient Lich instead. He and his brother Ro'Sothian are powerful liches that have the ability to control gryphons, ogres and trolls. Although he and and his brother are good at heart they have no qualms about using dark and evil means to achieve their ends.
They used to be in contact with Father Morvin.
The characters Ro'Arthian, Ro'sothian, and Stalrag first appeared in the Heir to the Throne scenario Mountain Pass, which took place before The Dwarven Doors. Konrad and his army encounter Stalrag and his shinsplitters clan feuding with the mage brothers Ro'Arthian and Ro'Sothian, and help the dwarves. This scenario was later cut from the campaign, but Northern Rebirth again featured the brothers carrying on a feud with Stalrag's dwarves over a mountain passage, this time as undead liches.
- Thank you, Tallin. Our old bones are weary of being animated long past their time. Now we will finally be able to rest in peace. However, as we have fought hard for this respite, we shall not allow our effort go to waste. When the Northlands are in direst need of us, we shall rise once again.
- Stalrag, for years now we have fought each other, but recent events have made us allies. I go now to eternal sleep; may we part as friends.