King Arthur is the final King Arthur kingdom's prestige hero and is unlocked at 500,000 prestige.
Unit Type - Lord's Retinue: High Critical strike rate, High Block Rate, High Dodge Rate.
Gambit - Excalibur: Attack a target and all enemies in the same row and column.
King Arthur is a mid-late game elite gambit hero. King Arthur has an amazingly high Tactics stat (highest in the game). His attack pattern is the same with Ogier the Dane.
It is recommended to equip him with the best mount you have as his best weakness is that unit type reduced damage. It is recommended to use until you clear Ancient Epic campaign or until you decide to play Hercules instead of him. Overall a great hero and the best King Arthur killer in mid game.