In your AU which queen created the spell with no name? Solaria? Hekatia? Eclipsa? I say this because the spell incantation is:



“I call the spell which has no name,

my mother’s gift with which she reigned,

eclipse my heart with rightful power,

stand before the Queen and cower!”



And if in this AU the spell was created by Solaria it would not made sense because "my mother's gift with which she reigned" was said by Eclipsa and her mother in this AU is Hekatia, so it wouldn't made sense if the spell was created by Solaria.