Warning: Character Death
-As some time passed, Melkor's host, who had already been aroused by the commotion at Lammoth where the burning of Losgar has taken place, passed through Ered Wethrin (the Mountains of Shadow) and assailed Fëanaro in a surprise attack while Fëanaro is talking with his eldest son, Neylo, while the six other brothers are gathered around a campfire with little Tyelpe between Curvo and Atya, who still sit awkwardly apart, not having reconciled properly yet.
-They talk about elves that had been seen scouting the shores of Lammoth and possibly following them all the way to Mithrim, before vanishing (Sylvan Elves, then Grey Elves).
-During this time, Atyarussa starts hearing a second voice in his head that he believed was the voice of his dead twin (for the first time since the Burning of Losgar), but tries his best to ignore it.
-After they were attacked in the night, it became Dagor-nuin-Giliath (the Battle-Under-the-Stars).
-The Noldor were still victorious and drove the orcs all the way to Dorthonion, led by Turkafinwë, shadowed by Atyarussa, the latter sent back on behalf of his brother to report the tidings of Melkor's armies ahead.
-The battle continued for ten days.
-When they face Melkor's army near Angband, Fëanaro runs ahead of his sons and his own warriors to fight them alone.
-The Balrogs appear and Fëanaro takes them on.
-He is continuously injured and is briefly knocked off his feet.
-His sons fight the army from the distance, but they catch up to help him when it seemed he would get overwhelmed.
-Separated and winded, after dodging one of the Balrog's flaming whips, Atyarussa has been knocked away by the wind of one of the Balrog's wings.
-The family all sees this in horror, but Maitimo and Fëanaro are closer.
-Atyarussa is shielded by Makalaurë as the flaming whip comes flying towards them for a lethal strike.
-As the whip is about to come down on Makalaurë back, who is desperately trying to cover his injured baby brother, but Fëanaro suddenly appears at the last second.
-Fëanaro's mind, which had been fey, had then been clouded in panic and paternal instinct in that moment to jump in front of them, meaning to parry the whip, but was instead wrapped in its flaming coil and gets slashed to the ground.
-With their father pierced and tangled in the whip, his sons watching in horror, Maitimo (who had also been charging) then lunges in with a cry to save them.
-He slashes at the Balrog's wrist, making it (none so gently) release Fëanaro from the whip's fiery coils, backing them away into the air and continues the fight.
-The battle doesn't last very long when Maitimo ends up getting captured instead.
-As the eldest son of Fëanaro is carried off, Makalaurë leaps up in the vain attempt to chase after him while slashing down orcs.
-A fatally burned and wounded Fëanaro watches ion horror and despair as his eldest son is carried off to Melkor's clutches.
-He tries to get up, whispering a strangled "No" before collapsing again.
-Alone with his father, this would have been the opportunity for Atyarussa to take his revenge (especially right after watching his beloved oldest brother be carried off).
-Lost and defeated, as well as bleeding out from all his wounds, Fëanaro see his youngest son now kneeling beside him with his bloodied blade still gripped in his hand, staring back as if frozen.
-In that suspended moment, Fëanaro thinks that his little Telvo was going to take his revenge, even though he witnessed him take the whip for him and Makalaurë.
-Resigned and full of regret, Fëanaro whispers to him, "Do it."
-When previously he wondered if Fëanaro's mind and heat were still on the Silmarils, that free allowance and surrender instead only made Atya-no, Telufinwë break down crying, realizing in that every moment that he still loved his father and didn't want him to die after all, so he rushes over to help him instead.
-Makalaurë and the brothers arrive in time to help him carry their father away, who still held onto Telvo's hand.
-As the sons carry him to safety, Fëanaro tells them to stop, knowing he was about to die, and curses Morgoth thrice.
-While Curvo and Kano hold him, Telvo in between Turko and Moryo by his side, Fëanaro feverishly makes them swear the Oath again.
-Telvo starts to get upset again and refuses at first.
-After insisting twice in vain to his youngest, including the brothers' encouragement for their father's sake, Fëanaro then begs him, revealing that they could only be free of the doom set upon them if they fulfilled the Oath.
-This finally gets Telvo to soften and reluctantly repeat the Oath with his brothers.
-They all weep; Makalurë starts singing; Curvo holds the dying Fëanaro while vowing to avenge both him and Neylo, echoed Moryo and Turko.
-Telvo is beckoned closer to Fëanaro by his side, close enough for his father to gaze upon him and caress his red hair weakly, showing more affection to his youngest than he has in a long time.
-Telvo doesn't say he forgives Fëanaro (he will later look back on it and regret it), but he tells him he loves him, which is enough for Fëanaro to shed a tear.
-Whispering Nerdanel's name, Fëanaro succumbs to his wounds, his body gradually dissolves into fiery ashes sweeping away into the sky and his finger catching a tear on Ambarussa's cheek, searing his jaw slightly with a burned scar.
Some of it may definitely be OCC, and things are definitely cut short such as the trap Morgoth laid for Maedhros soon after, but this is just one version, just for the sake of the ending of this scene.