Card Trivia:Magical Musket Mastermind Zakiel
- This is one of the cover cards of Deck Build Pack: Spirit Warriors/Spirit Warriors.
- This monster appears in the artworks of "Magical Musket - Crooked Crown" and "Magical Musket - Fiendish Deal".
- The pistols featured in this card's artwork are the same as those appearing in the artwork of "Magical Musketeer Caspar".
- This monster is based on "Samiel", the Black Huntsman, one of the main antagonists of the German opera Der Freischütz.
- This card's last effect has an oversight in the TCG, stating both "Once per turn" and "You can only use this effect of "Magical Musket Mastermind Zakiel" once per turn". The first string is redundant, as the effect cannot activate for both players on the same turn (it's only the opponent's End Phase from the perspective of oneplayer at a time); the second restriction already applies to all copies of this card.
