Oath

Lucas was about to ask the name of the world if it was the same world where his classmates were transported when he heard Lilith gasping in shock. When he heard why, he was stunned and was flabbergasted when he connected the dots.

'Heaven Grade Weapon?'

'She's not lying. It's really a Heaven Grade.'

The Devil's voice echoed in his mind.

Although Lucas had his answer, he still went to ask.

'Say, what are the grades of the weapon, and how do they qualify?'

The Devil was silent for a while and replied:

'It's simple. Earth Grade weapons don't have an aether, and Heaven Grade weapons do. They are still divided by minor ranking, from low to peak rank: depending on their quality. As for a Deity-Grade weapon? Such weapons have spirits with consciousness on their own.'

Lucas was astounded when he heard the last-grade weapon. A weapon with spirits with consciousness, isn't that staggering?