A creature with this trait has the nephilim versatile heritage. Nephilim are planar scions descended from immortal beings from other planes. An ability with this trait can be used or selected only by nephilim.
Source: Player Core pg. 80
You have a halo of light and goodness that sheds light with the effects of a divine light cantrip. A cantrip is heightened to a spell rank equal to half your level rounded up. You can Sustain to suppress or reestablish the halo.