With the apocalypse near, Zydrax decided to do something to strengthen Orion, no matter how futile it seemed.
Having inhabited the world's will for a long time before fusing with Ezra, he easily controlled it.
Tens of whirlpools formed in the stratosphere, absorbing mana from outside the planet and depositing it within, causing the mana density to surge.
By increasing the mana density, the average cultivation level would increase over time as advancing became easier.
In addition, more mana meant that the surroundings had more nourishment. Herbs and crops would grow faster and better, while beasts would grow stronger.
It was literally an all round enhancement.
From Ezra's words, this event happened a few years later in his past life.
With the dark situation during the time, Scholars used it to reignite hope, saying the increase of mana was the beginning of another Golden Era.