At the beginning, Ian thought the Dragon Island Seal had spontaneously collapsed, but soon, he noticed the true discord: "Why has the concentration of Aether become so low?"
Even Ian couldn't accurately notice the gradually declining Aether data over 160 million years at first glance. In fact, as the Terra Planet was shattered by the Calamity of Light, and the Domain of Void kept undergoing Reincarnation, the surrounding Aether concentration was already gradually decreasing, which was normal.
But from Ian's perspective now, perhaps it's the actual demise of Terra civilization, and the Perpetual Motion Machine 'Infinite Tide' returned to the Great Aether Circulation, thus there is no longer a Perpetual Motion Machine present within the Terra Cradle of the Ashen Pathway.
Without the Perpetual Motion Machine continuously providing Aether, all Aether in the natural environment would gradually devolve into Spirit Energy and Origin Quality, thereby unable to affect Space-Time.
