Those are events for the future. In the meantime, Helios is devouring a star. To be more accurate, he is eating it. He isn't so much using the law of devouring as forcefully taking solar mass from the star and taking it into his inner world.
The stellar mass is first swung around him in a loop that cools it down before ingesting it. Then it is passed on to Aeternus through Legion-7. So he is doing two jobs at the same time. The light he is producing is just a side effect of swimming in an ocean of plasma. It doesn't count as a third.
It is not a pretty picture. The star is doing its work diligently. It is going around the realm while providing light and heat, like it was created to do. Helios, on the other hand, is stalking this diligent star like a thief. He is keeping a close distance from it as he steals its solar mass. He is more of a parasite or a bully than a devourer.
