Detonating the Eternal Core had been Anvis's decision after careful consideration.
He had long since analyzed that secretly taking the Eternal Core away would benefit him far less than detonating it on the spot.
First of all, at the cost of detonating the Eternal Core, he could force roughly eighty percent of the Ninth Ranks in the city to remain behind.
After suffering this wave of fate backlash, no matter how many life-saving secret arts Brentz possessed, he would need at least twenty or thirty years to recuperate. In the short term, he absolutely would not be able to secretly interfere with the continent's fate from behind the scenes again.
This temporarily removed a massive obstacle from Anvis's path to changing his own fate.
At the same time, that mysterious existence within the Floating City likely would not have gotten off easily either.
The self-destruction of the Eternal Core was the most terrifying energy explosion Anvis had experienced across his several lives, far exceeding even his original expectations.
It had not been a mere explosion. To Anvis, the Eternal Core felt like a one-way valve leading to a boundless sea of Mana.
Its detonation was like opening an outlet in that sea of Mana. A nearly infinite torrent of Mana surged forth in an instant, destroying everything around it like a tsunami.
Though only for an instant, the astonishing Mana also destroyed the "outlet" itself.
But at the moment of eruption, following several Ninth Rank Limits through weak points in space, that horrifying destructive force, like a supernova explosion, forcibly shattered the spatial barrier between the Dream World and the real world, even bringing an immense Mana flow into reality.
And that enormous Dark Being had clearly been slowly recovering at the time and had not returned to its normal