Nephew of Arthur, ambitious and treacherous, seeks to usurp the throne.
Mordred is the external threat that enables Vortigern's conspiracy.
Mordred and his armies lay siege to Camelot, forcing Uther to infiltrate their stronghold.
Vortigern uses Mordred's assault to weaken Uther and pursue the throne.
Arthur learns that Vortigern persuaded Mordred to attack Camelot because of jealousy toward Uther.
Arthur inherits the consequences of Mordred's attack on his family and kingdom.
Mordred attacks Camelot during Uther's reign, creating the crisis that leads to Arthur's displacement.
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