If the Mesozoic Era was on Earth, strictly speaking, it would be a season of the Evident Universe.
However, in the Dark Star World, the Mesozoic Era is a new age, and by this time, the Dark Star World had acquired the conditions to nurture animals.
The mountains and rivers had become relatively more stable, and besides numerous hurricanes, tsunamis, and volcanoes, the continental plates gradually ceased drifting.
As for Lin Zhen, the most significant change was the enhancement of Star Power.
The Star Power of the Mesozoic Era was twice that of the Evident Universe. If Lin Zhen previously had 500 Star Power, with the Dark Star occupying 200, then upon entering the Mesozoic Era, Lin Zhen now had 700 Star Power, with the Dark Star taking up 400, officially surpassing the Star Power of the Constant Star Stage.
This was the benefit of elevating one's Realm. This unprecedented Dark Star brought immense help to Lin Zhen.