Home of Krogan Princess

Words of Power were only accessible to those with divine heritage. And here's another key lore drop:

When Tansul was divvying up his gifts, he gave the Tachonis a House in the Tenebral Reaches (notably not within his afterlife realm of the Golden Sky), and he gave the Halovar their very own angel.

So pre Shaper's fall, Yanessa had access to a being that could read the Words of Power, who could effectively teach her those words even if she couldn't read the Words herself. And then when the Shaper's died, Yanessa had a leg up. The Words were not only made legible to her, she was familiar with them. Maybe even Halovar was given a library of books to keep, because Goddard and his children may not be the first batch of Aasimars the Halovar have produced.

If it is true that Aetheon has looked after the Halovars for ages upon ages, maybe even built specifically for them, then what Yanessa did with Goddard was likely... A refurbished tradition. Aetheon couldn't make babies the old fashioned way so Yanessa took Words of Power to turkey baste her way into having a baby.

The rest of the non-Aasimar Halovars likely have Celestial Warlock as their source of power. And this has been the case since Tansul's time. But when Tansul died, that source of power went poof. So Yanessa pivoted. She used Aetheon as an anchor, might as well make him useful. Then she tattooed the contract onto her kin.

Aetheon is a construct with ties to the Domain of Order. His programming got corrupted severely without user input (i.e. Tansul), but his battery is still running.

Because here's another curious fact to consider. Aetheon kept his celestial powers. So clearly, he's not getting his from no Shaper. And we have an extraordinary hint as to where his abilities come from. What Tansul and other Shapers did when they created their angel was they stole. They stole the blueprints of djinn and eefreet (the servants of Primordials).

E16 quote from Dr. Talter: "But, however, the original spirits of service to the great Shapers were actually the original djinn and efreet of the primordials. Which we have some indication actually predates the earliest fossilized records, the remains of celestials and those we've been able to find or potentially harvest. "

But then, the Shapers connected the batteries for their little toys to the domains - the very same domains that Dr. Talter prays to.

So Yanessa went alright. Everyone pivot. She anchored the new generation of Halovars, post Tansul, onto Aetheon whose battery connected him to a non Shaper source of power. For all the rest, she gave them to demons.

She could also be dual classing, warlock wizard bullshit.