Second Fall of Camelot

"I’m going to enjoy killing you, Arthur Pendragon. Not even Emrys can save you now."

- Morgana to Arthur The second fall of Camelot occurred at night time when Morgana Pendragon and Helios seized the kingdom, forcing Arthur to flee. The attempt on Camelot was a surprise, and aided by the traitor Agravaine, who was up until then trusted by all of Camelot, except Merlin and Gaius. Agravaine gave Morgana the siege plans, who handed them over to Helios, so stopping the ambush before the citadel was taken was impossible.