Vortigan terrorizes Nimue's village in his search for the Holy Grail, burning the village to the ground. When Nimue and Merlin take the Holy Grail to an ancient fire to reforge it into a weapon, Vortigan arrives and confronts them both. The Holy Grail is reforged into Excalibur, which Vortigan tries to obtain. However, he fails and Nimue - who had drank from the Holy Grail without Merlin's knowledge - proves to be resistent to Vortigan's blades before ripping out his heart and crushing it, killing Vortigan. This evil act results in Nimue becoming the first Dark One, and she dons Vortigan's mask.
- None known (family)
- He is based on Vortigern the warlord from Arthurian Legend.
- S5, E07: "Nimue" (flashback)