- This card can be searched by "Dogu", "Single Purchase", "Temple of the Kings", "Transmodify", "Infestation Infection", "Chaos Zone" and "Lucent, Netherlord of Dark World".
- This card can be Tribute Summoned with one Tribute using "Double Coston", "Steelswarm Genome" and "The First Monarch".
- Use "Steelswarm Genome" as Tribute for this card's Tribute Summon so you can use only 1 monster as tribute.
- If this card is in your graveyard, use "Recurring Nightmare" so you can retrieve this monster and another DARK monster with 0 DEF to your hand.
- Longhorn only needs 1 of the Tributes to be a Steelswarm monster to be able to activate his effect. If you already control 1 Steelswarm monster (like "Steelswarm Scout"), you can Summon "Evilswarm Castor" or "Evilswarm Kerykeion", activate their effects, then Tribute both monsters and Longhorn will still be able to destroy monsters.
- This card can be searched by "Witch of the Black Forest".
Community content is available under CC-BY-SA unless otherwise noted.