Card Trivia:Overmind Archfiend
- This card is an upgraded form of "Thought Ruler Archfiend".
- This card's Japanese name, "Mental Over Demon", is based on "Mental Sphere Demon", the Japanese name of "Thought Ruler Archfiend".
- This can be considered the 'darker' evolution of "Thought Ruler Archfiend", with the 'lighter' one being "Ultimate Axon Kicker".