The tree of life

After the short delay with talking to the elven children, Kara guided Ren and Leila to the center of the city near the tree of life. Now that he was close to the tree, Ren noticed that the tree was bigger than it was when looking at it from a distance. But more than that what really took Ren by surprise was the thickness of the mana near the tree. 

It was thicker and denser than whatever Ren could dish out. In fact, this level of power was the same as those on the top 50 incarnations in his soul realm. Yet unlike what they emit which was suffocating and overbearing, the mana released by the tree was soothing and harmonious. 

Ren found that being this close to something that's pumping out this much mana made it easier for his body to absorb more mana. Right now after his soul was fixed by the ORIGIN, he was already growing stronger at a ridiculous rate, but being near this tree was able to slightly speed up his already ludicrous growth rate.