Peckinou
The world just isn't fun without a little chaos.
Long ago there was a battle between the gods over the earthen plains which led destruction and chaos after intense battles and no results the gods all agreed to a solution where every thousand years the gods would give a fraction of their powers to one human that would be known as Guardians and they will fight for control over the earthen realm in the name of their god, but if the gods lost their guardian their influence in the gods court would be put to ruins and they would get 0 say and be forced to cater to the whims of the other gods until the next millennium. Every child who is blessed by a god on that millennium is given powers, contact with their god and the ability to live for 1000 years (So they will basically age a bit slower or just stop ageing at a certain point and resume ageing at some other point.)