• The symbol on the glass dome that encases its brain resembles the universal symbol for power, commonly found on the power buttons of many electronics.
  • This card originally had the text You can pay 800 Life Points to Tribute 1 Psychic-Type monster you control to Special Summon 1 Level 4 or lower Psychic-Type monster from your Deck in face-up Attack Position., but was given an errata soon after it was released.[1] This is the first case in which Konami announced a card errata on their website.


  1. "「メンタルマスター」カードテキストに関するお知らせ". Konami. Retrieved February 6, 2017.