The underground is all it was ever called. A tiny old shack in the middle of the woods in the Allir Reach. Nobody of good repute or legal standing knew of this place, only those with a finger on the pulse of the underworld would know of this shack, and the illegal fighting pit beneath it.
Inside the shack was little to find, an old bed, a table, no food in sight, and an illusion spell giving the impression that nobody had been there in ages. Showing to the untrained eye thick layers of undisturbed dust covering everything.
But to those who knew of its nature, they would see through the illusion just enough to see the slightest outline of a trap door in the floor over in the corner. A long ladder descending deep into the earth would follow this discovery, and at the bottom they would find tunnels. Again illusions would guard the way, but those who knew the secret would recognize the hidden signs that will lead them the right way till finally their efforts would be rewarded by finding a door that led to the entryway filled with coats and walking sticks.
Beyond the door on the opposite end one could finally hear the roar of crowds and beasts alike. Upon investigation the entryway would open to a massive underground chamber. Bars, gambling tables, games, and in the middle... A deep pit of smooth stone walls.
In this pit captured monsters and slaves were pit against each other in deadly match-ups. Beasts forced to fight for the enjoyment of the audience and their masters. The fights were always bloody, and always to the death. This was the ugly underbelly of mortal hearts, for no kind hearted person would tolerate such barbaric entertainment.
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Normally Tozen wouldn't have allowed himself to be captured. He was simply traveling through the forest when he came upon a camp of men who were talking about this Underground.
They were monster hunters tasked with capturing beasts for the pit fights.
Of course, being captured would normally have been the greatest shame for Tozen, but he was intrigued by the Underground. This was another change to fight, to grow, to change, to survive, to adapt, to evolve. He simply couldn't pass this up. So he put on a show, let himself be captured, and now he found himself chained to a wall with heavy (But weak) chains in a deep dungeon waiting for his debut in the arena.
He sat in silent anticipation. There were others in the cells next to his. Perhaps he would have to fight them. But there will be death on this night, and the crowd was already getting their appetites wet.