Yu-Gi-Oh! Terminology

Field Power Bonus
In the Duelist Kingdom arc of the anime and manga, each Dueling Arena had the properties of a specific type of land mass. If a monster was Summoned on a terrain it favored, it would receive a 30% increase in its ATK and DEF. This is called a Field Power Bonus. Unlike Field Spell Cards, arenas sometimes had multiple types of field, that could power up different monsters depending on which Monster Card Zone they were played on.

The Field Power Bonus rule was also utilized in the first series of the anime. However, it didn't appear to matter what side of the field you were sitting on when playing monsters on certain field squares.

Locator Card
In the Battle City tournament, each duelist recieved 1 Locator Card containing a small portion of the Battle City map. Each time a players win a duel, they recieve their opponent's Locator Card. Once they win six Locator Cards, if they place them on their Duel Disks, the site of the Battle City Finals will be revealed.

Egyptian God Phoenix


Egyptian God Phoenix (or Ra's phoenix mode) is a form of The Winged Dragon of Ra. In this form, Ra receives no battle damage. It may be safe to say that Ra, while in this mode, is immortal since an egyptian god is immune to card's effect in the anime. Ra's phoenix mode's most well known effect is likely that it may destroy any one monster at the cost of 1000 Life points. This effect was used on Joey's Gilford the Lightning by Marik and again on Yugi's Slifer the Sky Dragon and Obelisk the Tormentor (Ra failed to destroyed Obelisk however) once again by Marik. This effect was also used on Jaden in Yu-Gi-Oh GX by Franz, this time though, Phoenix destroyed all of Jaden's monsters. Ra may only remain in this mode for one turn however.

The Eye of Wdjat
The Eye of Wadjet is Commonly called the "Millennium Symbol", and only appears when a Millennium Item holder is either using "Shadow Magic" or when someone else is under the control of another Millennium Item. It also appears on all of the Millenium Items except for the Millennium Key/Ahnk.

Several cards feature the symbol as well. Most cards with the word "Millennium" have the Wadjet eye in the card artwork. For example, Millennium Shield is basically Big Shield Gardna's Shield with the Eye of Wadjet in the middle. Millennium Scorpion also has the Wadjet eye on its back. A Man with Wdjat (another spelling of Wadjet) has the symbol on his forehead and hands. The crop circle in the card Crop Circles also resembles an Eye of Wdjat.

Great Leviathan
This refers to the Orichalcos god. It was exclusive to the "Waking the Dragons arc. It was buried 10,000 years ago when Atlantis sank. Dartz, the king of that city, was brainwashed by the Orichalcos and told to resurrect The Great Leviathan using human souls. He had been doing that up to present day and hired three workers, Alister, Valon, and Rafael. He would also get Rex Raptor, Weevil Underwood, Mai Valentine, and an unnamed Duelist. All of his crew would eventually get their souls taken by the Orichalcos. In order to resurrect the Leviathan, however, Dartz would need the souls of the three Duelists that hold The Legendary Dragon Cards (The Fang of Critias, The Eye of Timaeus, and The Claw of Hermos), Yugi Mutou, Seto Kaiba, and Joey Wheeler. In Yami Yugi's first Duel with Rafael, Yami activated The Seal of Orichalcos after Rafael gave it to him via Exchange in a desperate attempt to win the Duel. He would eventually lose and Yugi's soul gets taken away, leaving Yami behind. In his second duel with Mai, Joey collapsed from exhaustion in his Duel with Valon and therefore, loses by default. Dartz would face off against Yami and Seto in the final duel of the arc. With a Deck full of Orichalcos monsters, Dartz was too much for Seto and his soul gets taken away. However, using the power of the Legendary Knights, Yami was able to defeat Dartz and release the souls of Yugi, Seto, and Joey. Unfortunately, Dartz gave up his own soul, allowing the Great Leviathan and Atlantis to rise. In a battle in the skies over the ocean, Yami and his three Egyptian Gods were able to defeat the Leviathan and later, Yami was able to the release the Orichalcos from Dartz. Atlantis then returned to the bottom of the sea.