Những "Earthbound Immortal" đều có hiệu ứng giúp chúng có thể tấn công trực tiếp, đồng thời khiến đối phương không thể chọn chúng làm mục tiêu tấn công. (Trong anime, đối phương vẫn có thể tấn công trực tiếp nếu người điều khiển chỉ có quái thú "Eartbound Immortal" trên sân; điều này thì không đúng trong TCG/OCG. Tuy nhiên, trong anime thì các Earthbound Immortal sẽ miễn nhiễm với hiệu ứng của Bài Phép/Bẫy.)
- Chỉ duy nhất 1 quái thú "Earthbound Immortal" được có mặt trên sân trong cùng một thời điểm.
- Quái thú "Earthbound Immortal" sẽ ngay lập tức bị hủy nếu không có Bài Phép Môi trường trên sân.
"Earthbound Immortal" có liên quan đến các Nazca Lines, nơi chúng bị giam cầm. Mỗi con trong số chúng đều là những hình vẽ trồi lên trên mặt đất, và chúng có những vân hình khác nhau trên mỗi artwork của chúng.
The Earthbound Immortals are the evil incarnations that were sealed away in the underworld by the Crimson Dragon and its servants 5000 years before the events of Yu-Gi-Oh! 5D's. These malicious entities were released as a result of the Zero Reverse incident. They serve as the ace monsters of the Dark Signers, possessing them to serve as gatekeepers of Old Ener-D, which serves as the entrance of the underworld.
|Color||Earthbound Immortal||Unique effect||Dark Signer||Origin|
|Red||Uru||Once per turn: You can Tribute 1 other monster, then target 1 face-up monster your opponent controls; take control of that target, until the End Phase.||Roman Goodwin||Spider|
|Orange||Aslla piscu||When this face-up card leaves the field, except by its own effect: Destroy as many face-up monsters your opponent controls as possible, and if you do, inflict 800 damage to your opponent for each monster destroyed.||Carly Carmine||Hummingbird|
|Yellow||Cusillu||If this card would be destroyed by battle, you can Tribute 1 other monster instead, and if you do, halve your opponent's LP.||Devack||Monkey|
|Green||Ccarayhua||If this card is destroyed by a card effect, except by its own effect: Destroy all cards on the field.||Misty Tredwell||Lizard|
|Blue||Ccapac Apu||If this card destroys an opponent's monster by battle: Inflict damage to your opponent equal to the destroyed monster's original ATK.||Kalin Kessler||Giant|
|Indigo||Chacu Challhua||Once per turn: You can inflict damage to your opponent equal to half this card's DEF. This card cannot attack during the turn you activate this effect. While this card is in Defense Position, your opponent cannot conduct their Battle Phase.||Greiger||Killer whale|
|Violet||Wiraqocha Rasca||If this card is Normal Summoned: Target up to 3 cards you control, except this card; shuffle those targets into your Deck, then discard as many random cards from your opponent's hand as possible, but not more than the number of returned cards, and if you do, this card gains 1000 ATK for each card discarded by this effect.||Rex Goodwin||Condor|
The "Earthbound Immortal" monsters are very powerful and have effects that range from inflicting Effect Damage to your opponent while locking their Battle Phase ("Chacu Challhua"), to taking control of an opposing monster, as in the case of "Uru". Also, all of them can attack their opponent directly and cannot be targeted for attacks.
As powerful as they are, they have some drawbacks: there cannot be more than 1 "Earthbound Immortal" monster on the field at the same time. They are also destroyed if there is no Field Spell Card active, much like cards in the "Malefic" archetype.
Despite the restrictions, they can all be Special Summoned with no other conditions. So dumping the "Earthbound Immortals" in the GY then Special Summoning them back is another easy way to get them.
Because they depend on Field Spell Cards being on the field, cards like "Ancient Fairy Dragon", "Black Rose Dragon" and even "Mystical Space Typhoon", "Twin Twisters", etc. can cause "Earthbound Immortal" monsters to destroy themselves. However, in the anime, and some video games where Turbo Duel existed, this weakness is eliminated as Spell World cannot be destroyed at all, making them also completely immune to this weakness. As a result, if an Earthbound Immortal is summoned during a Turbo Duel, you either has 10 Speed Counterparts to destroy them, or prevent them from being summoned in the first place. Cards like "Field Barrier" or "Malefic Stardust Dragon" can be used to protect a Field Spell Card from being destroyed, but the latter means that the direct attacking effects can't be utilized. This is because Malefic cards are the only monsters that can attack while on the field.
Cards that cause the Field Spell Card to leave the field without destroying it (such as "Shaddoll Dragon" and "Castel, the Skyblaster Musketeer") are still a threat even with "Field Barrier" or "Number 66: Master Key Beetle". This can cause additional problems if "Field Barrier" is in play, as it prevents a new Field Spell Card being played while it is active.
- Some fans of the show and players of the trading card game get confused on how to pronounce "Ccapac Apu" and "Ccarayhua's" names due to the double C.
- The first C is pronounced "co".
- "Wiraqocha Rasca" would have originally gone to Crow as the final Dark Signer, as it fit with his already avian-themed Blackwing Deck. However, it ended up going to Rex Goodwin instead due to how popular the "Blackwing" archetype had become among the fans.