After half an hour, the star was finally stable. What Eris and Isdis had made was a star that was two times the mass of the mortal world's sun, and they wouldn't have been able to achieve that without Merlin magic preventing them from devouring each other.
Even now, Eris could still smell Isdis's divine magic on her soul and see what could've become of them both. Like two stars dancing around each other, the bigger one would've consumed the smaller one.
Eris could've fully devoured Isdis and absorbed her portfolio, which would be the worst-case scenario. But there was one where Isdis would survive, and that was if Eris stopped at the last moment. Eris could have absorbed just the portfolio and turned Isdis into an archon instead of a divine, basically leaving her crippled.
