Like some of the undead spells Dago had encountered before, [Ghost Arrow] required first cultivating an undead servant before it could be cast.
However, the spell principles behind [Ghost Arrow] were extremely advanced. It transformed a ghost into something similar to a "Soul Arrow," allowing it to directly attack and kill an opponent's soul.
The discovery of this spell pleasantly surprised Dago.
His battle against the Elder Spirit Wizard Ewakuai during the Prodigy Battle had made Dago realize how severely lacking he was in soul defense and offensive methods. This was undoubtedly a fatal weakness. His victory over Ewakuai had been quite fortunate.
The appearance of [Ghost Arrow] greatly made up for this weakness.
At the very least, if he encountered a similar opponent in the future, he would no longer be left standing there and "passively taking hits."
"No wonder Maflin never managed to cast this spell. So he hadn't mastered it himself either. I suppose no one has learned this spell from the Bone Death Knell inheritance for many generations. Otherwise, Bone Death Knell's fearsome reputation in the south would be more than ten times greater than it is now!"
Although he could not cultivate it at this stage, he could begin making some preparations.
The most crucial requirement for cultivating [Ghost Arrow] was a ghost, and Dago happened to have a suitable one.
He lightly shook the cowbell in his hand. Strange spell fluctuations rippled out, and a dense cloud of nearly black gray smoke poured from the bell. Immediately afterward, a figure appeared before Dago.
It was a short-haired youth with a deathly pale face and blood streaming from his eyes.
He wore a tattered robe that was nearly rotten away. Aside from the wisps of gray smoke swirling around him, he looked almost no different