Burning Sword

Burning Sword (, Burning Sword) is 's Final Smash in Super Smash Bros. Ultimate.

Overview
Pyra summons Rex, who says "Do it, Pyra!" and performs an overhand slash to transition into a cutscene. In the cutscene, Pyra says "Yeah, on it.", and she and Rex hold the Aegis Sword together and leap toward the trapped opponents, shouting the move’s name. The game then transitions back into normal gameplay, where Pyra and Rex summon a large pillar of fire in front of them, which then explodes. Pyra says "Witness our power!" at the end of the Final Smash. Compared to Mythra's Sacred Arrow, Pyra's Burning Sword deals less total damage and has less horizontal coverage, but has much higher KO potential.

If the initial slash fails to hit anyone, the rest of the Final Smash does not occur.

Origin
In Xenoblade Chronicles 2, Burning Sword is Pyra's Level 4 Blade Special. The technique also serves as one of Pyra's signature moves, as she and Rex perform Burning Sword during many cutscenes. The move's animation in Smash is a recreation of its animation in battles in Xenoblade Chronicles 2.

Trivia

 * Burning Sword, Sacred Arrow, and Final Blaster are the only Final Smashes that start off with a cinematic but end in-game. The opposite holds true for Infernal Climax.
 * Along with, these are also the only Final Smashes from DLC characters in Ultimate to contain non-cinematic elements.
 * Masahiro Sakurai revealed in a YouTube video that footage from  was used to tweak the animation of Burning Sword during development.