Card Trivia:Hidden Spellbook
- This card's artwork seems to depict the same library as the artwork of "Spellbook Organization", with similar books that are neatly organized.
- This card was formally known as "Hidden Book of Spell" in the TCG until its reprint in Gold Series: Haunted Mine.
- This is because this card and "Spellbook Organization" are valid members of the "Spellbook" archetype released in Return of the Duelist, despite being released many years before the archetype was created. Their Japanese names use the same characters for "spellbook" (魔導書, madōsho) as the "Spellbook" archetype, which was translated as "Book(s) of Spell" prior to the archetype's creation.
