Originally Posted by Future Esthar
Ultimecia wanna to take the power,body and mind of all the sorceresses to become Sorceress Adel.
Hyne doesn´t need time compression to do that.He needs Time Compression to deceive the persons of his time when Ellone send their counsciousness to the past.
He could as well just time travel and aplly the amalgament magic on all the sorceresses and knights.That would be more easy.(And he has made it on another universe of time).
However,Ellone´s interference forced him to compress time.That way,no one would think for example that Rinoa and Edea would turn into Adel along with Ulti(this one would be even more stupid since she was suposed to live on the future).
Plain genious.
Hyne decided to compress time after Ellone sent people´s consciousness to Ulti´s time(further on the past).He knows that Elle being emotionally attached to the other sorceresses and knights would also try to send people´s counsciousness to their eras as well.
But Hyne anticipated her performing Time Compression and changed the events so that people would see it differently.
Of course you would ask why didn´t Rinoa(the True Ellone) tells us this.
Hyne possessed Caraway and turned his house into a device which would make people inside loose memory(when locked on a special way).
That´s why he wanna Rinoa to be locked there.
But Rinoa was sided with Laguna to overturn Hyne´s plans.
Which means she didn´t forget anything but pretends so to deceive Hyne.
However Hyne still see Rinoa as a potencial danger.
He tried to get a hold of a cyborg which imitates Ellone´s powers and physical appearance.
Of course he will use this to replace Ellone and confuses people.
He thinks Rinoa forget about her ability.