Corrin partially transforms into dragon form, punching one fist down and causing two yellow geysers of light to erupt on both sides. In terms of the quote used during it, Male Corrin says "Out of the way!" (道を開けてくれ!, Get out of the way!) while female Corrin will say "This ends here!" (終わりです!, This is over!).
Any opponents hit by the attack will get transported to a mountain-filled area, where Corrin, in full dragon form, then fires a large whirlpool to drown anybody caught in it away and cause them to suffer massive knockback when the attack is over.
The Final Smash deals a total of 40% damage — 5% from the initial shockwave, and 35% from the resultant whirlpool.
Corrin blasts two columns of light on either side. If one hits an enemy, Corrin transforms into a fearsome dragon and unleashes a maelstrom that launches anyone unlucky enough to be caught. The light columns shoot straight up for a short moment, so using this move high up after knocking or throwing opponents overhead is very effective!
Similarly to Ike's Great Aether, this move is unique to the Super Smash Bros. series, never making any appearance in Fire Emblem. However, this move may hold some inspiration from Azura, the deuteragonist of Fire Emblem Fates, who has the ability to use hydrokinesis to great lengths with the power of her necklace. This ability is notable in a cutscene from both the Birthright and Conquest paths, where she used her water manipulation skills to exorcise the evil force controlling King Garon. It may also be related to their home game's main antagonist, Anankos' ability to manipulate water, which apparently Corrin also possesses, as in their dragon form, water flows from their feet during the cinematic battle of Fire Emblem: Fates.