Verteron Citadel is short on Guardians due to the heavy Krall offensive. Go to Sanctum and ask Lavirintos for reinforcements.
Step 1. Go to SanctumThe glorious capital city of Elysea, floating high above the ground through the power of the Seraphim Lords. and deliver the letter to LavirintosThe Commander of the Miragent Holy Templars found in the Protectors Hall of Sanctum. As the first son of a family which has produced Daevas for generations, he has never doubted his life as a Guardian..
Step 2. Go to the Library of the SagesAn ancient library to the south of the Artisans Hall. and talk to XenophonA military researcher who studies at the Library of the SagesAn ancient library to the south of the Artisans Hall. in Sanctum. Known to be a brilliant strategist..
Step 3. Return to Verteron CitadelA fortress at the center of Verteron Swamp. It was constructed to defend the Abyss Gate. and talk to SpatalosThe Fortress Commander of Verteron CitadelA fortress at the center of Verteron Swamp. It was constructed to defend the Abyss Gate.. He lost his wife and son in the Krall War, and has become correspondingly ruthless in his pursuit of victory..