Days, then weeks, flowed like starlight through the Nexus Spire. Elias immersed himself in the painstaking refinement of the Entropy-Reversal Singularity Core. It was a delicate dance with cosmic forces, ensuring that the nascent singularity within his dantian remained perfectly stable, a contained universe of energy reversal. His focus was absolute, yet now, with the constant flow of Perpetual Ascension Pills and the automated efficiency of his cultivation, he found his mind often drifting to Kaelen. Her laughter, her intelligent questions, the simple comfort of her presence – these thoughts no longer interrupted his work; they enriched it.