- This card is based off of one of two religious deities: either the fourth horseman of the apocalypse, Death, or the Morning Star.
- This card's appearance is similar to that of "Kamionwizard".
- Interestingly, both cards are also Extra Deck monsters.
- This card seems to be an antithesis to "Seven Swords Warrior".
- This card belongs to Jack Atlas, while his rival, Yusei, owns "Seven Swords Warrior".
- They're both Level 7 Synchro Monsters.
- They both use Equip Cards to inflict damage to their opponents.
- This card destroys Equip Cards while "Seven Swords Warrior" supports them.
- This card's name and first effect may be a reference to the movie Highlander in that if this card is the only Synchro Monster on the field, then there can be only one Synchro Monster out, similar to the movie's tagline.
- This card bears a slight resemblance to another "King" monster, "Demise, King of Armageddon".
- In addition, this card shares a similarity with "Fog King", in that they both go against how you would normally play them (without using "Fog King's" effect.) This card is a Synchro monster that prevents Synchro Summoning, while "Fog King" is a Level 7 monster and prevents players from tributing cards.
- This card and "Light and Darkness Dragon" are the only main ace monsters used by a rival to have 2800 ATK instead of 3000.
- On the same note, this card and "Light and Darkness Dragon" are signature cards of the rivals from a manga.
- This monster appears in the artwork of "King's Consonance".