Requiem of the Dying Sun

Upon activating the Fire Release Cloak and Sage Mode together, Densetsu can then unleash his strongest technique; which has been described as the very pinnacle of the Fire Release: the Requiem of the Dying Sun.

Overview
The magnitude and range of the attack owes it's incredible vastness due to its Senjutsu enhancements, with Densetsu pumping in everything to ensure the attack hits its target. Upon entering Sage Mode, he first exerts Wind Release chakra over a wide range, covering ranges hundreds of metres high and wide; before shaping it like a massive orb which fully encompasses him.

He then activates his Fire Release Cloak, blasting powerful Senjutsu enhanced flames into the exerted Wind, before shaping the gigantic inferno into the shape of a huge spear around him. Combining his natural speed, the thrust of the flames (magnified greatly by the exerted wind) and Senjutsu enhancements, Densetsu charges at the opponent with speeds so high that they seem instantaneous—even from long range.

The flames around the Uchiha incinerate everything in their path, vaporising any lifeform unlucky enough to be caught directly in the crosshairs and inflicting horrid burns on those up to 50 metres away. Upon contact, Densetsu finally releases his flaming chakra in the form of a massive explosion. The explosion is magnified