Watching him, Jack's father spoke.
"It was our family's duty to defeat the Niles Radcliffe.
"However, we were too weak to do that."
He continued,
"The burden that had been shackling our family for hundreds of years has finally disappeared.
"It's all because of you.
"This spell is our family heirloom. Please accept it as our thanks."
Neo looked at the book.
He picked it up and flipped through the pages.
The pages were filled with theoretical knowledge, subshell diagrams, and extra notes for detailed explanation.
"Our ancestor made this Spell.
"Since then, every generation's patriarch has made slight changes to the Spell and continued to improve it."
The man smiled.
"You can take it without worrying that it will be useless.
"It's a Terror-ranked spell: Black Dawn of Despair."
"…!?"
Neo looked at Jack's father.
"Terror ranked?"