Card Trivia:Magical Musket - Steady Hands
- "Magical Musketeer Doc" appears in this card's artwork.
- This card's OCG name is a reference to endorphin, which is any of a group of hormones secreted within the brain and nervous system and having a number of physiological functions.
- It was likely changed in the TCG to remove or lessen implication of drug use, given the serum "Magical Musketeer Doc" looks to be consuming.