From the Sea-Covering Dragon Emperor's lingering remnant, Snow Emperor and you each obtained something with tangible practical use. Snow Emperor received a special True Spirit tempering Secret Art, said to temper the True Spirit with low risk. As long as one paid attention to certain matters, it would not affect the True Spirit.
The Secret Art had no restrictions on who could learn it. Aside from Snow Emperor, who could receive and comprehend it directly, others could also hold the stone and contemplate it. Those with high comprehension could learn it as well. Thus, this stone could serve as the Cold Abyss Divine Palace's secret True Spirit-tempering method, and you could study it too.
You, meanwhile, obtained a clump of blue viscous matter from the lingering remnant. It looked somewhat disgusting, yet you could faintly sense that it would be useful to you. After carefully experiencing it, you noticed that the anomaly in your body had actually been triggered by the Child of the Sea, which had not made its presence felt for a long time. Combined with the Sea-Covering Dragon Emperor's lingering remnant's brief explanation, you understood that this should be a treasure capable of directly improving talent.
You suddenly gained some insight. Perhaps it was precisely because the lingering remnant had sensed the Child of the Sea and your considerable affinity with the water element that it, along with the many aquatic creatures, bore you no ill will?
Yet this still made it difficult to explain why Snow Emperor had also been favored by the lingering remnant. But everyone had their own secrets; perhaps Snow Emperor was the same...
Besides these two items, before allowing you to leave the Dragon Emperor Illusionary Dream, the lingering remnant chose to answer one question each from Snow Emperor and you.
Snow