User blog comment:Hybrid Shadow/Teaser/@comment-5824375-20150418020210

Okay, okay. Everyone seems to get the impression it's about Hell or something similar, though I will say this: the arena in question doesn't hint on anything religious (this includes Hellenism and other religions, not just Christianity.)

To convey more light, here's another hint:

It involves something that occurred in history.

I won't get overly specific about what era, so that's the best you can look into. Sorry about being vague, but subtlety is important :P