When Morgoth, once of the divine order, turned his thought against the Music that shaped the world, and in doing so became its great dissonance, his envy for Eru and longing for the Secret Fire evolved into a will that sought not merely mastery but the unmaking of divine harmony itself. His threatening "chaos" was not void nor simple destruction. It was Rúcinë — a shattering of life and matter of Arda. He longed for Úpartalë, the great disorder, destruction, and at last disturbance and confusion of the divine order. Therefore his Úlindë, disharmony, was not just a cacophony intending to take over the Great song, but a discordance that began to corrupt Arda deeply from within by becoming part of it and thus marring it. Morgoth’s chaos therefore worked two ways: as a threat of destruction if resisted, and as a threat of irreversible corruption if left unopposed. Though he could never unmake Ëa and turn it again into a gaping Void, the actual destruction of Arda and the death of life within, or at last unbearable and unjustifiable pain and suffering, remained a very real peril. This was the principal reason why the Valar could not simply wage a full, final war on Morgoth, for the clash of such powers would itself risk Úpartalë or even Rúcinë. When the War of Wrath had prevented Rúcinë and so averted the utter destruction of Arda and its life, it had nonetheless not undone Úlindë. The Wise knew that only Illuvatar, with his almight, could fully restore Arda to harmony and divine order. But as the creator he remained outside his creation, and yet he must enter it to heal it from within. Therefore it was necessary that he descend into Arda in the form of an Eruhin, to become the Elpino or Runando, the "Anointed" or "Redeemer", and be both outside and within his own making. While Morgoth had been banished, his stain or shadow had remained in Arda. And as long as Úlindë lingered, the world could not be whole. Yet those who still kept faith, knowingly or unknowingly, kept faith in Illuvatar's promise.
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Editorial Note: This entry contains speculative or fan-based material — such as fanon, fanfiction, or theory constructs — that may not be directly supported by canonical texts. Interpretations offered here are part of the NNCA’s speculative corpus and should not be mistaken for primary Tolkien sources.