User blog comment:EmrysOfAlbion/Battle of Kilgharrah and Aithusa/@comment-4135736-20120418100308

In my version, which will probably be a two part story, the battle will happen when Kilgharrah and Aithusa develop a rivalry with each other as they both want to protect Camelot but it gets worse when Kilgharrah learns that Aithusa saved Morgana which causes a major falling out between the two, and they separate.

Meanwhile, Arthur by this time has learned of Merlin's magic and banishes him from the kingdom for not telling him. Morgana (who now knows that Merlin is the sorcerer Emrys) and Mordred have formed an alliance with the Saxons, and some evil sorcerers, and they all attack Camelot. Camelot starts to lose but Arthur, regretting his decision to banish Merlin, finds him, they apologise to each other and Merlin (who briefly disguises as Dragoon as a symbol of hope to Camelot) finds the Druids and they all battle the Saxons, Morgana, Mordred and their army of evil sorcerers, turning the tide of the battle for Camelot.

Mordred retreats along with some evil sorcerers and Saxon's but Morgana stays, encountering Merlin, and they prepare for a magical duel when Kilgharrah and Aithusa unexpectantly arrive. Aithusa tries to stop the battle, separating the Saxons, evil sorcerers, Druids and Knights of Camelot but Kilgharrah battles the Saxons and evil sorcerers, and tries to kill Morgana, only for Aithusa to intervene.

Kilgharrah and Aithusa have a fierce battle until Kilgharrah throws Aithusa to the ground, almost completely on Morgana and Merlin, injuring them. Kilgharrah then breaths fire on Aithusa to kill him but Morgana, who is conflicted, uses a shield spell to save him, herself and Merlin from the fire (forming a brief alliance with him). Merlin uses his dragonlord ability to force Kilgharrah and Aithusa to stop fighting and make up, they then leave, Morgana, shocked at her actions, leaves the battle herself while the remaining Saxon's and evil sorcerers all retreat.

Arthur, although shocked at what happened, seeing the two Dragons and Morgana's brief alliance with Merlin, realises that magic can be used for good (due to Morgana and Merlin's actions) as well as evil and finally chooses to return magic to Camelot, much to the delight of Merlin and the Druids. It would all end with other sorcerers entering Camelot, delighted that they are finally free.