Card Trivia:Muko
- The man in this card's artwork also appears in the artwork of "Invalidate".
- This card's Japanese name also translated to "Invalid".
- This card's artwork is very similar to the artwork of "Soul Charge".
- Since this card was released first, it is possible that the artwork of "Soul Charge" was based on this card's one.
- This card's original name was "Null and Void". On February 10th, 2017, this card received an errata in the official database, changing its name to the current one: "Muko".
- This was likely to avoid an unintended interaction between this card and the "Void" archetype, which was released in Raging Tempest in the TCG on the same day.