Despite absorbing a substantial amount of blood from Eren, Reen's form remained somewhat unstable.
It seemed that the demonic soul fragment within Reen was unable to fully occupy the vessel due to its inadequate strength.
"Hmm? What might be the issue here?" Eren pondered to himself, scratching his chin. He wasn't concerned that Reen's artifact creation would fail. After becoming a demi-god, he possessed enough confidence in his ability to complete the task, regardless of the challenges that arose.
However, Eren desired Reen's transformation into an Elder Seed Artifact to be flawless without any lingering anomalies. Unlike the case with the demonic saber, he sought perfection in Reen's transformation.
"I... I think I know what she needs, Eren," Alephee finally concluded as she examined Reen's unstable form.
