Hmm...



Fact: Princess Luna has the power to manipulate dreams and the night, like Vaermina.



Fact: Discord has the power to cause insanity, like Sheogorath.



Fact: Celestia has the power to control dusk and dawn, like Azura.



Fact: Tirek returned to Equestria in his true and terrible form, like Mehrunes Dagon.



Fact: Queen Chrysalis was (kinda) a shape shifting trickster, like Sanguine.



Conclusion: THEY’RE ALL DAEDRA IN DISGUISE.



Aything I might’ve missed?