Mana

When a race ascends they gain the ability to use mana or magic. An atom that's unreactive until filled with mental intent. Evolved races make of this to better their lives and technology however having a constant supply is tricky as they take a while to recharge.

many self proclaimed gods descend upon worlds gaining worship of the natives and spreading their mana to the world. it's long term investment. You reap what you sow and the benefits are amazing.

utilizing the elements is quite difficult. Ever wonder why people have an affinity to certain magic. By filling the atom with intent you can transform it into another atom. a profound knowledge on molecular structure is needed to recreate the element you desire. People with affinity to one element have a better understanding of their particular element making easier to learn.

It can also be applied physically strengthing muscles and bones to unimaginable levels, like cultivators.