|This card's written lore in the anime was not shown, was too small to read, or was partially or completely obstructed; the lore listed here is a reconstruction based on how it was used, character descriptions of the card, and/or its OCG/TCG lore. It may not be accurate or complete.|
Thought Ruler Archfiend
- Japanese: メンタルスフィア・デーモン
- Romaji: Mentaru Sufia Dēmon
- Translated: Mental Sphere Daemon
When this card destroys a monster by battle and sends it to the Graveyard, gain Life Points equal to that monster's original ATK. You can pay 1000 Life Points to negate the activation of a Spell or Trap Card that targets 1 Psychic-Type monster, and destroy it.