- This monster appears in the artwork of "Spellbook of Judgment".
- This card is based on the Tarot card, Death, the thirteenth of the Major Arcana.
- This card's OCG name is from the French name for "Death", La Mort.
- According to "Gagaga Academy Tospedia 7", this card is "Fool of Prophecy" after being corrupted and transformed by the black magic of the "Spellbook of the Master", when he decided to choose a random "Spellbook" from "The Grand Spellbook Tower".
- The ATK of "Fool of Prophecy" ATK + 1000 (from "Spellbook of Power", which can be copied by "Spellbook of the Master") = 2600 ATK, which is equal to the ATK of "Reaper of Prophecy" after using its first effect.
- The second effect of this card is similar to the effect of "Spellbook of Secrets", which can also be copied by "Spellbook of the Master".
- Incidentally, the only Normal "Spellbook" Spell Cards during the archetype's first release in the OCG Return of the Duelist were "Spellbook of Secrets" and "Spellbook of Power".
- The third effect of "Reaper" is similar to effect of "Fool" that Special Summons a Level 5 or higher DARK Spellcaster-Type monster from the Deck and both needing 5 or more "Spellbook" Spell Cards in the Graveyard to activate their effects.