Morgaine returns to Camelot under guise with another sister of Avalon during another Pentacost festival. Wielding great magic, Morgaine and her sister make manifest the Holy Grail—one of the sacred regalia of Avalon. The assembled court sees the manifestation of the Grail as a holy revelation. When the knights of the Round Table leave to search for the Holy Grail, Mordred attempts to usurp the throne. In a climactic battle, the armies of Arthur and Mordred fight and Arthur is mortally wounded. Morgaine takes the dying Arthur through the mists to Avalon, reassuring him that he did not fail in his attempt to save Britain from the approaching dark times. Arthur dies in her arms as the shoreline comes into view. Morgaine buries him in Avalon and remains there to tell the tale of Camelot.