Mercenary Knight is a last chest keeper boss in Malgar Realm.
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. Boss can be defeated multiple times each new timeline. Player also receives achievement "Clear Area VII" that adds 2% to non-tap monsters.