Gained 5,000 Levels in a Single Day (2)

I grabbed the obsidian chest to claim my Boss Floor clear reward.

"Or, watch closely!!"

My level was about to rise. By 5,000.

I'd get stronger by the equivalent of climbing the Hard Tower two and a half times.

…Enough to surprise even Or!

"Here I go!!!"

Wham—!!

I opened the chest.

And I was about to experience a level-up on a scale I'd never seen before…

[….]...