In the shadows of the S Ranked Main character

Kathlyn.

She was a prideful person ambitious and incredibly driven.

One of the few students from Class C who, by skill alone, should've been placed in Class B. If the academy had ranked students on actual ability instead of raw data and pedigree, she would've already been halfway up the ladder to Class A.

And that's exactly what she wanted.

To ascend.

To climb.

To stand shoulder to shoulder with somone like Eugene or June

Or better yet above them.

That ambition led her straight into the Underground Relic Prisms—special dungeon-like anomalies created by the Demon God of Games and Trickery a million years ago. These relics they stole information spells ect to make death game inheritances

Depending on the prism's rank, it could be an inheritance vault, a death trap, or a treasure room that turned its user into a walking power fantasy.

A rogue teacher offered the starving, resource-deprived C and D rankers a taste of forbidden fruit.