- Osiris (Greek language, also Osiris; the Egyptian language name is variously transliterated Asar, Aser, Ausar, Ausir, Wesir, or Ausare) is the Egyptian god of life, death, and fertility. He is one of the oldest gods for whom records have been found and first appears in the Pyramid Texts around 2400 BC, when his cult is already well established. He was widely worshiped until the forcible suppression of paganism in the Christian era. Osiris was not only the redeemer and merciful judge of the dead in the afterlife, but also the underworld agency that granted all life, including sprouting vegetation and the fertile flooding of the Nile River. The Kings of Egypt were associated with Osiris in death such that as Osiris rose from the dead so would they, in union with him, inherit eternal life through a process of imitative magic. By the New Kingdom all people, not just pharaohs, were believed to be associated with Osiris at death if they incurred the costs of the assimilation rituals.
- Osiris is the oldest son of the Earth god, Geb, and the sky goddess, Nut as well as being brother and husband of Isis, with Horus being considered his posthumously begotten son. He is usually depicted as a green-skinned pharaoh wearing the Atef crown, a form of the white crown of upper Egypt with a plume of feathers to either side. Typically he is also depicted holding the crook and flail which signify divine authority in Egyptian kings, but which were originally unique to Osiris and his own origin-gods (see below), and his feet and lower body are wrapped, as though already partly mummified. The information we have on the myths of Osiris is derived from allusions contained in the pyramid texts, and, much later, in narrative style from the writings of Plutarch and Diodorus Siculus.
- The Original Promo "Egyptian God Cards" are illegal to use in any and all real duels (both Traditional and Advanced Format alike), and they also have no effects, but they can be used in The Sacred Cards, Nightmare Troubadour, Spirit Caller, Tag Force 2, 3, 4 and 5 (via UMD recognition) 5D's Stardust Accelerator, 5D's Reverse of Arcadia and 5D's Over the Nexus.
Slifer the Sky Dragon
You must offer 3 Tributes to Special Summon this card. The ATK and DEF of this card becomes the number of cards in your hand × 1000. When this card is Special Summoned from the graveyard, it is sent to the Graveyard during the End Phase. While this card is face-up on the field, it cannot be targeted by Spells, Traps, or Monsters that designate a target. Additionally, when your opponent successfully Summons a monster 2000 points is deducted from the Monsters ATK or DEF respective to its position. If this effect reduces the amount to 0 or less the monster is destroyed.
- Further research compiled from both what has been stated in the Anime/Manga and video games, has yielded what I've placed below as the determined powers Slifer possesses in his entirety.
Slifer the Sky Dragon
This card cannot be Set. This card can only be Tribute Summoned by Tributing 3 monsters. The Normal Summon of this card cannot be negated. When this card is Normal Summoned, Spells, Traps, and Effect Monster effects cannot be activated. While this card is on the field, control of this card cannot switch and the card is unaffected by the effects of Trap Cards and Effect Monsters other than “Obelisk the Tormentor” and “The Winged Dragon of Ra”. The effect of “Obelisk the Tormentor” only affects this card for one turn. The effects of Spell Cards only affect this card for one turn. This card cannot be removed from the field by the effects of Spell Cards. This card’s ATK and DEF are equal to 1000x the number of cards you have in your hand. When a monster is summoned to your opponent’s side of the field in Attack or Defense Position, decrease its respective ATK or DEF by 2000. If this reduces that card’s ATK or DEF to 0, destroy that card.
Video game effects
One of the three "Egyptian God Cards", Slifer the Sky Dragon is unusual in that its flavor text is printed as its "effect". Despite this obstacle, however, effects have been given to it in its video game appearances. "Slifer" was also released in the 7th Japanese Booster of Yu-Gi-Oh! Dungeon Dice Monsters.
Slifer the Sky DragonIt requires 3 Tributes to Normal Summon. In Battle of the Great Duelist, the power increase is only 1 level (500 points), and can only increase by up to 1500.
A dragon that can power up based on the cards in the hand. For every card in the player's hand, power is upped 3 levels (1500 points).
Slifer the Sky Dragon
You must offer 3 Tributes to Tribute Summon this card. The ATK and DEF of this card becomes the number of cards in your hand × 1000. When this card is Special Summoned, it is sent to the Graveyard during the End Phase. While this card is face-up on the field, it cannot be targeted by Spells, Traps, or Monster effects. Additionally, when your opponent successfully Summons or Flip Summons a monster with an ATK or DEF of 2000 or less, destroy that monster.
Slifer the Sky Dragon
You must offer 3 Tributes to Tribute Summon this card. The ATK and DEF of this card becomes the number of cards in your hand × 1000. When this card is Special Summoned, it is sent to the Graveyard during the End Phase. While this card is face-up on the field, it cannot be targeted by Spells, Traps, or Monsters that designate a target. Additionally, when your opponent successfully Summons or Flip Summons a monster with an ATK or DEF of 2000 or less, destroy that monster.
In addition to the effects above, the "Thousand Rules Bible" book (Japan only) offered the following:
Saint Dragon - God of Osiris
GOD/Illusionary God Animal/10/X000/X000
Requires you to sacrifice 3 monsters to Summon (this is treated as a Special Summon). This Monster's attack and defense strength are each equal to 1000 times the number of cards in your hand. Whenever your opponent Normal Summons or Reverse Summons a Monster with a defense strength of 2000 or less, destroy it. This monster cannot be the target of monster, Spell or Trap effects.
Note that "Slifer" was also released in the 7th Japanese Booster of Dungeon Dice Monsters.
- This card is inspired by the same Egyptian God - Osiris - that "Hieratic Dragon of Asar" is.
- This card along with "Ra" are two of the three Gods to make some kind of appearance in three of the five series.
- The English name of this card was named after 'Roger Slifer', an employee of 4Kids.
- Because of that, it is the only Egyptian God not to be named after its Japanese counterpart as the two other Egyptian Gods were.
- Since the "Egyptian God" Cards were color-coded according to their skin colors, the unplayable version of "Slifer the Sky Dragon" is the first (and currently only) card to be color-coded red.
- In the Japanese version of Yu-Gi-Oh! Duel Monsters, this card, and the other "Egyptian God" cards are in English, while still using their Japanese names.
- In the Japanese version of Yu-Gi-Oh! Duel Monsters, Defense is misspelled as Deffence on this, and other "Egyptian God" cards.
- This card's original (illegal) version is currently the only official Yu-Gi-Oh! card to have a letter character (X) in its ATK and DEF stats.
- This monster along with Yami Yugi appears in page 12 of chapter 104 of Bobobo-bo Bo-bobo manga by Yoshio Sawai.
- In the Millennium World manga, "Slifer" is also known as "The Dragon King of the Sky" (天空の竜王 Tenkū no Ryūō).
- The background of this card was used in the video game Yu-Gi-Oh! Forbidden Memories as one of the Forbidden Ruins wall designs. Interestingly, the hexagram was not edited out in the international card artwork, yet the "Forbidden Memories" international version had it replaced with an hexagon.
- This card's second alternative artwork resembles the pose Slifer takes from its flashback appearance in Yu-Gi-Oh! The Dark Side of Dimensions.