Card Trivia:Worm Zero
- A smaller version of this monster appears in the artwork of "W Nebula Meteor".
- The city that appears in this card's artwork also appears in the artwork of "Worm Call".
- This monster is the "Worm" planet.
- This monster appears to be a hive of "Worm" monsters, rather than an individual monster.
- Fittingly, this card can Special Summon more "Worm" monsters.
- This card is the ultimate "Worm" monster, as its name starts with the letter "Z".
- This monster appears to be a hive of "Worm" monsters, rather than an individual monster.
- This card has a "lswarm" counterpart: "Evilswarm Azzathoth".
- While this card is the last "Worm" monster due to its name starting with "Z", "Azzathoth" is the first "lswarm" monster as its name starts with "A".
- This is the first Reptile Fusion Monster.
- This is also the first Fusion Monster of a Duel Terminal archetype.
- This monster is similar to the Moon.
- This monster's front face seems to be based on the so-called 'Old Man of the Moon face' that can be seen in the full moon phase.
- The text of this card's Spanish print refers to the "Worm" archetype as "Gusano/a" instead of "Gusano".