I like to ponder how beautifully poetic it would be if certain natural phenomena - ball lightning, the aurora borealis, volcanic lightning crackling through a dirty thunderstorm or dangerous, toxic-choked thermal springs, had been born of a burst of passion and the creative union of Mairon and Melkor in an age long past…
Back when the Ainur had not yet bound themselves to physical forms, when Mairon had only just met Melkor, the confluence of their feelings, their passion, the shared torrent of their minds and ideas, and their love amidst the act of creation would give birth to something truly terrifying, yet breathtakingly sublime. In that young, burgeoning world, it belonged to no one but them…
And tragically, when Melkor was imprisoned for the second time forever, Mairon would never again be able to experience such unbridled creative will, such pure, raw elemental energy of bringing something into existence with anyone else.
Yes, he and Celebrimbor crafted and forged together, but that was something else entirely. It was physical. Not bad, merely fundamentally different - delicate, precise and subtle. Whereas with Melkor, it had been pure, unadulterated energy and tempest - explosions, wildness and the raw passion of the primordial elements.