>>535114318
>Astellar became Diabellstar the millisecond the Diabell magic entered her and Elzette.
I thought they got the magic as soon as Azamina began corrupting Diabell. It was her last ditch effort to protect to her daughters since Elzette resisted Azamina's mind control despite serving her for years. Astellar immediately ran away once the White Forest got messed up and only came back after she got the sinful spoils which would give her the power she needed to defeat Azamina.