Stolen Bodies

The frozen battle they had witnessed was not a battle between the Defiled legion of Verge and the defenders of Twilight. 

Instead, it was a battle between the Dread Lord and Soul Stealer. 

The two Defiled Saints must have clashed as soon as the last true bastion of humanity in the Tomb of Ariel had fallen. Perhaps it was because they had needed each other's power before that. Perhaps it was because Soul Stealer had finally become capable of resisting the authority of the Dread Lord after devouring the souls and stealing the bodies of millions of humans in Twilight.

'Can it be his Transformation Ability?'