"It's going to really… really hurt for her."
Lucivar's lips curled into a cynical smile.
In truth, he wasn't really that mad about being manipulated by Master Tobias, who was adamant that he did it to make him stronger. Rather, he was quite grateful. He didn't need Master Tobias' help to become what he is right now, as this had always been his fate.
But he couldn't deny that Master Tobias helped him achieve it faster.
Killing Delilah to push Lucivar to the edge when he realized the betrayal from his real family was not enough, grouping him up with the family who provided the environment to reaffirm his conviction—he couldn't deny Master Tobias' work.
Just the act of manipulation alone doesn't trouble Lucivar at all.
And killing Delilah was brutal and painful, but necessary.
However, that doesn't necessarily mean Lucivar would spare him.
It only meant that Master Tobias would die knowing that he was grateful for helping him grow.