Last Source

Magical beings are the ruling class on this world. Priest are run by them. Those without powers are considered useless. The moment they were born in this world, each everyone attached a power source to their bodies, it called a core.

The single source of power in entire realm; the tree of power sources is taken over by dark forces. They cast a dark spell and then the magical tree gradually drying up the roots even the leaves. The handler of the power source took their magic.

Then now, the "non-magic" beings relying to her. The only one who can save the world from this darkness, the last source, the 8th goddess, but she's nowhere to be found.