Card Trivia:Gren, Tactician of Dark World
- This card's name is the "Dark World" color pun for the color green.
- This card's name and effect of destroying Spell Cards is a reference to Spell Cards featuring a green-colored border.
- This card's Chinese name, 綠古林, is a combination of 綠 ("green") and 古林 gǔlín (transcription of its Japanese name グリン Gurin).
- "Dark World Grimoire" seems to be depicted in this card, but note this book has no "legs" which "Dark World Grimoire" has.
- This monster appears in the artwork of "Dark World Archives".