101 I'm Outnumbered? You're Outnumbered!

The walls of the caverns shifted, becoming a perfectly spherical room. All of William's traps were instantly destroyed, and a marble pedestal rose from the ground in the center of the room with a small black box resting on top.

William approached the pedestal quickly, eyes gleaming as he fantasized about the possible loot he would receive. He picked up the black box and carefully opened the lid, revealing a small vial of blue liquid inside.

-Completed an A-Rank Trial in the Gravitas Ruins: +500 PP

-Acquired Mana Dragon's Blood Essence: +250 PP

Mana Dragon's Blood Essence? System, what does it do? 

-Request requires 5 Potential Points. Yes/No?

Yes.