Card Trivia:Yggdrago the Sky Emperor
- This is the cover card of Strongest Battle Deck Nail - Maximum Haven, as well as one of the cover cards of Maximum Ultra Enhancement Pack.
- This monster appears in the artworks of "The Menacing Eyes of the Sky Emperor" and "Transmigration of Curiosity" in Maximum Mode (together with "Yggdrago the Sky Emperor [L]" and "Yggdrago the Sky Emperor [R]").
- Along with "Yggdrago [L]" and "Yggdrago [R]", this monster is based on Yggdrasil, the immense tree that connects the Nine Worlds in Norse mythology.
- Along with "Yggdrago [L]" and "Yggdrago [R]", this is the first Maximum Monster to be Maximum Summoned in the Yu-Gi-Oh! SEVENS anime.
- This monster has two non-Maximum Monster counterparts: "Deep Space Yggdrago" and "Space Yggdrago".