Then his sons raised up their father and bore him back towards Mithrim. But as they drew near to Eithel Sirion and were upon the upward path to the pass over the mountains, Fëanor bade them halt; for his wounds were mortal, and he knew that his hour was come. And looking out from the slopes of Ered Wethrin with his last sight he beheld far off the peaks of Thangorodrim, mightiest of the towers of Middle-earth, and knew with the foreknowledge of death that no power of the Noldor would ever overthrow them; but he cursed the name of Morgoth thrice, and laid it upon his sons to hold to their oath, and to avenge their father. Then he died; but he had neither burial nor tomb, for so fiery was his spirit that as it sped his body fell to ash, and was borne away like smoke; and his likeness has never again appeared in Arda, neither has his spirit left the halls of Mandos. Thus ended the mightiest of the Noldor, of whose deeds came both their greatest renown and their most grievous woe.

I've always loved what Tolkien did with Fëanor as a character. The guy was not only a brilliant craftsman, but also a talented linguist. Basically a golden child of the Noldor. He managed to bring doom upon himself, his family and his people by making a series of Not So Wise Decisions, persuaded a significant part of the Noldor to follow him to the Middle Earth without a clear plan (not to mention the oath and its consequences that he must have known about - c'mon, he wasn't an idiot). Then he... died, just after arriving to the Middle Earth. Literally in the first battle he fought in. But no, no, no. That wasn't enough - his last words were "Morgoth's a bastard, don't forget about the oath and pls avenge me" spoken to his sons just before he spontaneously combusted.

So iconic <3