"Yusei's Last Stand", known as "The Three Immortal Polar Star Gods! Cry Out, Saver Star Dragon!" in the Japanese version, is the one-hundred-and-twenty-eighth episode of the Yu-Gi-Oh! 5D's anime.
Yusei faces Halldor, as he looks to strengthen his defenses while looking for a way to win the match. On the other hand, Halldor begins with a spectacular opening by Synchro Summoning "Odin, Father of the Aesir". Yusei then finds himself riding on impossible odds against the Three Gods against whom all Spells and Traps are useless. Though Yusei is driven to the edge by the brutal attacks of the gods, his strategy sees through the powers of the God Cards, bringing the duel against Team Ragnarok to its exciting climax as he opposes Halldor by Summoning "Majestic Star Dragon".
Since "Cosmic Compass" was sent to the Graveyard for a Synchro Summon, its second effect activates, allowing Yusei to draw one card ("Wave Rebound"). Yusei Sets "Wave Rebound". He then activates his face-down "Stay Force" and activates its effect to pay 1000 Life Points and negate the effects of "Majestic Star Dragon" until the next turn. This prevents "Majestic Star Dragon" from returning to Yusei's Extra Deck during the End Phase due to its last effect.
Turn 18: Halldor
Halldor draws. During the Standby Phase, the effect of "Speed World 2" activates (Yusei's SPC: 5 → 6; Halldor's SPC: 5 → 6). He then activates his face-down "Odin's Eye" (whose activation cannot be negated, so Yusei cannot use "Majestic Star Dragon's" effect) to negate the effects of the "Aesirs" in order to see Yusei's Set card. It is revealed to be "Wave Rebound". Halldor realizes that if he activates "Odin, Father of the Aesir's" effect now, Yusei will activate "Majestic Star Dragon's" effect to Tribute itself and destroy all cards on his field. The Aesirs will revive themselves on the End Phase, but Yusei will activate "Wave Rebound" to negate the Summons and inflict damage to Halldor equal to the ATK of the "Aesirs", defeating Halldor. Halldor Sets a card. On Halldor's End Phase, Yusei removes one Chain Counter from "Monster Chain" (Chain Counters: 2 → 1).
Turn 19: Yusei Fudo
Yusei draws. During the Standby Phase, the effect of "Speed World 2" activates (Yusei's SPC: 6 → 7; Halldor's SPC: 6 → 7). Yusei then activates "Speed World 2's" effect to remove seven Speed Counters (Yusei's SPC: 7 → 0) and draw one card. Yusei activates the effect of "Stay Force" again (Yusei 3000 → 2000) to negate the effects of "Majestic Star Dragon" until the next turn.
On Halldor's End Phase, Halldor activates the effects of the "Aesirs" to revive them, but Yusei activates his face-down "Wave Rebound" to negate the Summons and inflict damage to Halldor equal to the ATK of the Aesirs, however Halldor activates the effect of "Gjallarhorn" from his Graveyard, returning it from his Graveyard to his Spell and Trap Card Zone and activating it. The remaining effects of "Gjallarhorn" are explained in the next episode.
"Majestic Star Dragon" is supposed to return to the Extra Deck if it the End Phase of either player's turn, but this effect did not activate during Halldor's turn (making it appear as if the writers mistook "Majestic Star Dragon's" effect as activating only during its controller's End Phase).