It was at that moment Abel suddenly realized he forgot something.
He forgot to kill Diablo with his human body.
He was having way too much fun in physical combat.
These days of intense battle boosted his angel body's sword mastery to a whole other level. It might have taken him 10 years if he was just practicing by himself.
His angel sword techniques were almost perfect, which was a reward on its own.
But still, he needed to make up for his mistake. His human body opened its eyes and flashed towards the angel body.
The human body carefully reached out some energy into the druid soul to signify it was the one who killed Diablo.
Suddenly, the world stone between Diablo's eyes flew into his head and merged with his own world stone like it was returning home.
Abel sensed the world stone in his soul getting larger. Maybe he was only one piece away from fully recovering all the world stones.