The greatest issue with Abominations was their heavily-twisted magic circuits.
As long as their magic circuits remained in such twisted forms, they would continue to experience indescribable pain that only they would know.
'To treat an Abomination, I have to unravel their twisted magic circuit and end the pain it inflicts on them. Only then would they recover the ability to think,' Vaan recalled.
Physical appearance could be slowly recovered through magic, but the mind cannot—not without eliminating the root cause of their mind's ailment first.
Shortly after Vaan's Rank 4 Purple Sword was cleansed and sterilized, he immediately slashed open the Plant-type Abomination's chest, revealing its inner organs and heavily-twisted magic circuit.
At the same time, the Plant-type Abomination cried in agony and resisted strongly. However, it failed to move due to the black iron spikes restraining all of its movements.