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{{Infobox/Yu-Gi-Oh!/Episodeepisode | series = Yu-Gi-Oh! | season image = 3 | image name = Yugioh129.jpg | image size = | image caption = | english en_name = Clash in the Coliseum - Part 1 | kanji ja_name = 天空闘戯場 遊戯ｖｓ海馬 | romaji romaji_name = Tenkū Koroshiamu Yūgi Vāsasu Kaiba | japanese translated ja_trans_name = Sky Colosseum - Yugi vs. Kaiba | episode series = Yu-Gi-Oh!| number = 129 | japanese air date season = 3| ja_air_date = October 15, 2002 | english air date en_air_date = May 29, 2004 | japanese opening ja_opening = [[WILD DRIVE]] | japanese ending ja_ending = [[Paradise]]<br /> 楽園 | english opening en_theme = Yu-Gi-Oh! Theme | english ending screenwriter = Akemi Omode

*Second Duel of the "[[Battle City]]" Semi-Finals.*Yugi and Kaiba Duel in a hologram of an ancient Roman coliseum.*[[Continuous Spell Card]] "[[Spell Sanctuary]]" is in play throughout the whole duel, letting both players use face-down Spell Cards as quick play spells *When "[[Slifer the Sky Dragon]]'s" attack misses, it hits the skyline causing lightning bolts to shoot down from the sky. This reactivates the power levels of Seto's blimp, allowing [[Mokuba Kaiba|Mokuba]] to call a helicopter for [[Joey Wheeler|Joey]] and activating the broadcast of the Duel on [[Battle City]]'s giant screens.*When "[[Slifer the Sky Dragon (originalanime)|Slifer the Sky Dragon]]" and "[[Obelisk the Tormentor (originalanime)|Obelisk the Tormentor]]" clash, the power of the Egyptian Gods is revealed: [[Battle City]]'s giant TV screens explode and a vision of the past is displayed to Yugi and Seto's minds.*Spanning over 6 episodes, this duel is and the duel between [[Dartz]], Yugi, and Kaiba, are the longest in the [[Yu-Gi-Oh! second series (anime)|Yu-Gi-Oh! anime]].* When "Slifer the Sky Dragon's" attack misses, it hits the skyline causing lightning bolts to shoot down from the sky. This reactivates the power levels of Seto's blimp, allowing Mokuba to call a helicopter for Joey and activating the broadcast of the Duel on Battle City's giant screens.(episode 130)

*Yami Yugi draws. He then Normal Summons "[[Queen's Knight (anime)|Queen's Knight]]" (1500 [[ATK]] / 1600 [[DEF]]) in [[Defense Position]].*and Sets a card.

*Kaiba draws "[[Obelisk the Tormentor (anime)|Obelisk the Tormentor]]". He then Normal Summons "[[X-Head Cannon (anime)|X-Head Cannon]]" (1800 [[ATK]] / 1500 [[DEF]]) in [[Attack Position]].*Activates [[Continuous Spell Card]] Kaiba then activates "[[Spell Sanctuary]]", allowing to allow both players to add a Spell Card from their [[Main Deck|Deck]] to their hands: Yugi selects "[[Change of Heart (anime)|Change of Heart]]"; while Seto selects "[[Cross Sacrifice]]" Soul Exchange (replace by "[[anime)|Soul Exchange]]" in the Dub). From now on as As long as "[[Spell Sanctuary]]" remains in play, both players can activate any kind of spell card Spell Card during their opponent's turn, as long as it is face down.*Kaiba then Sets a card.

*Yami Yugi draws "Alpha the Magnet Warrior". Yugi's hand contains "Big Shield Gardna", "Exchange", "Collected Power", "Magical Hats", "Change of Heart", and "Alpha the Magnet Warrior". Yami Yugi then Normal Summons "[[Alpha The Magnet Warrior (anime)|Alpha The Magnet Warrior]]" (1400 [[ATK]] / 1700 [[DEF]]) in [[Defense Position]].*and Sets a card.

*Activates Kaiba draws "Interdimensional Matter Transporter". Kaiba's hand contains "[[Spell CardLullaby of Obedience (anime)|Lullaby of Obedience]] ", "[[Cross SacrificePower Balance]]" (replace by , "Obelisk the Tormentor", "Soul Exchange", and "[[Interdimensional Matter Transporter (anime)|Interdimensional Matter Transporter]]". Kaiba activates "Soul Exchange]]" in the Dub) so he can tribute order to allow himself to Tribute Yugi's two monsters he intends as if they were his monsters. Kaiba plans to [[Tribute]] them all Yugi's "Queen's Knight" and "Alpha the Magnet Warrior" with his own "X-Head Cannon" in order to summon Tribute Summon "[[Obelisk the Tormentor (original)|Obelisk the Tormentor]]" to the field.*, but Yugi activates [[Spell Card]] his face-down "[[Change of Heart]]", taking to take control of Seto's "[[X-Head Cannon]]" until the end of the turn, thwarting Seto's plans.*Seto then activates his set [[Quickface-Play Spell Card]] down "[[Enemy Controller (anime)|Enemy Controller]]", paying to pay 1000 LP Life Points ([[Seto Kaiba|Seto]]: 4000 → 3000 [[Life Points]]) to and take back control of "[[X-Head Cannon]]" (NOTE: "[[Enemy Controller]]" actually requires a monster [[Tribute]] to take control of an opponent's monster, not a [[Life Point]] cost) *. Yugi then activates [[Quickhis face-Play Spell Card]] down "[[Lightforce Sword (anime)|Lightforce Sword]]", removing to remove from play "[[Obelisk the Tormentor (original)|Obelisk the Tormentor]]" randomly from Seto's hand for three turns. (NOTE: in the real gameKaiba's hand now contains "Lullaby of Obedience", "[[Lightforce Sword]]Power Balance" is a Normal Trap card, not a Spell card)and "Interdimensional Matter Transporter".

*Yami Yugi draws "Life Shaver". Yugi's hand contains "[[Big Shield Gardna (anime)|Big Shield Gardna]]", "[[Exchange (anime)|Exchange]]", "[[Collected Power (anime)|Collected Power]]", "[[Magical Hats (anime)|Magical Hats]]", and "Life Shaver". Yami Yugi Sets a card.

*First turn that "[[Lightforce Sword]]" is keeping Seto's "[[Obelisk the Tormentor (original)|Obelisk the Tormentor]]" removed from the game.*Summons Kaiba draws "[[Y-Dragon Head (anime)|Y-Dragon Head]]" and subsequently Normal Summons it (1500 [[ATK]] / 1600 [[DEF]]) and in Attack Position. He then activates its special the effect of "Y-Dragon Head" to equip it itself to "[[X-Head Cannon]]", increasing the latter's Become [[ATKXY-Dragon Cannon (anime)|XY-Dragon Cannon]]/[[and increase its ATK and DEF]] by 400 ("[[XXY-Head Dragon Cannon]]": 1800 → 2200 [[ATK]] / 1500 → 1900 ) in [[DEFAttack Position]]).  *Attacks "X-Head Cannon" attacks and destroys Yugi's "[[Alpha The Magnet Warrior]]" with "[[X-Head Cannon]]".*Activates [[Spell Card]] Kaiba then activates "[[Lullaby of Obedience (anime)|Lullaby of Obedience]]", paying to pay 1000 LP Life Points ([[Seto Kaiba|Seto]]: 3000 → 2000 [[Life Points]]) to and take "[[Slifer the Sky Dragon (originalanime)|Slifer the Sky Dragon]]" from Yugi's [[Deck]] and add it to his hand.*Yugi then activates [[Spell Card]] his face-down "[[Exchange]]", allowing which allows each player to take a card from the other's hand: Yugi selects "[[Slifer the Sky Dragon (original)|Slifer the Sky Dragon]]"; while Seto selects "[[Life Shaver (anime)|Life Shaver]]".

*When [[Joey]] dreams about himself dueling, in the Japanese he says he is at '"The Domino City Tournament'". *"[[Lightforce Sword (anime)|Lightforce Sword]] " is changed from a magic Magic to a trap card Trap Card in the English versiondub. *Cut from the dub is a A shot of [[Yugi]] looking at his face -down card and wondering if that is the reason that [[Kaiba]] did not attack himis cut from the dub. * In the dub, "[[XY-Dragon Cannon (anime)|XY-Dragon Cannon]]" is shown on Kaiba's [[Duel Disk]]; in the Japanese version, "[[X-Head Cannon (anime)|X-Head Cannon]]" is on the Duel Disk.

* [[Alpha the The Magnet Warrior (anime)|Alpha The Magnet Warrior]]* ''[[Queen's Knight (anime)|Queen's Knight]]''

* [[Big Shield Gardna (anime)|Big Shield Gardna]]<ref group=Notes name=hand>This card can be seen in Yugi's hand.</ref>* [[Kuriboh (anime)|Kuriboh]]<ref group=Notes name=search>This card can be seen when Yugi search in his [[Main Deck|Deck]] for "[[Slifer the Sky Dragon (originalanime)|Slifer the Sky Dragon]]" by the effect of "[[Lullaby of Obedience (anime)|Lullaby of Obedience]]'s" [[Card effect|effect]].</ref>* [[Slifer the Sky Dragon (originalanime)|Slifer the Sky Dragon]]

* [[Change of Heart (anime)|Change of Heart]]* [[Exchange (anime)|Exchange]]* [[Lightforce Sword (anime)|Lightforce Sword]]<ref group=Notes name=magic>This was played as a [[Quick-Play Spell Card]]. It is an a [[Trap Card]] in the ''[[TCG]]''/''[[OCG]]''.</ref>* [[Magical Hats (anime)|Magical Hats]]<ref group=Notes name=hand /><ref group=Notes name=magic />

* [[Collected Power (anime)|Collected Power]]<ref group=Notes name=hand />* ''[[Life Shaver (anime)|Life Shaver]]''<ref group=Notes name=hand />

* ''[[X-Head Cannon (anime)|X-Head Cannon]]''

* [[Obelisk the Tormentor (originalanime)|Obelisk the Tormentor]]|union monsters =* ''[[Y-Dragon Head (anime)|Y-Dragon Head]]''

* ''[[Enemy Controller (anime)|Enemy Controller]]''* [[Cross Sacrifice]]* ''[[Interdimensional Matter Transporter (anime)|Interdimensional Matter Transporter]]''<ref group=Notes name=magic /><ref group=Notes name=hand2>This card can be seen in Kaiba's [[hand]].</ref>* ''[[Lullaby of Obedience (anime)|Lullaby of Obedience]]''* [[Soul Exchange (anime)|Soul Exchange]] (Dub)

* [[Alligator's Sword (anime)|Alligator's Sword]]* [[Keldo (anime)|Keldo]]<ref group=Notes name=normal>This was played as a [[Normal Monster]]. It is an [[Effect Monster]] in the ''[[TCG]]''/''[[OCG]]''.</ref>* [[Mudora (anime)|Mudora]]<ref group=Notes name=normal />* [[Red-Eyes B. Dragon (anime)|Red-Eyes B. Dragon]]* [[Vorse Raider (anime)|Vorse Raider]]

* [[Big Shield Gardna (anime)|Big Shield Gardna]]* [[Kuriboh (anime)|Kuriboh]]

* [[Card Destruction (anime)|Card Destruction]]* [[Cestus of DaglaDe-Spell (anime)|De-Spell]]* [[De-SpellMystic Box (anime)|Mystic Box]]* [[Mystic BoxShrink (anime)|Shrink]]* [[ShrinkSword of Dogra (anime)|Sword of Dogra]]

* [[Crush Card Virus (later DM anime)|Crush Card Virus]]* [[Spellbinding Circle (anime)|Spellbinding Circle]]

* [[Panther Warrior (anime)|Panther Warrior]]