Hired mercenary to protect chest. He wears heavy white armor and uses mace as a weapon. He is next after Green Dragon by level and location. His race is unknown, but probably is a cat... or not?
After defeating the boss, player receives a Blue Chest as a reward. Mercenary Knight may be defeated only once per timeline.
After defeating the Mercenary Knight for the first time, player receives an achievement "Clear Area VII" which multiplies non-tap monsters' DPS by 1.02.