The grand arena of Equestria. It a very fine symbol of power, money, and history. Over the years, such fine warriors have battled within those ancient walls for so many different reasons. In the older times they were used to settle disputes between houses. Later they were used as a type of enjoyment to watch criminals fight for their lives. Now they are used as a gambling place for pride, honor, and social status.
The grand arena of Equestria houses so many different creatures that fight against one another because that had been saved from the fate that was laid on them without their knowing. These saved creatures see no fault in this since they can not die within the walls on the magically protected place.
Every creature has a master that cares from them outside of the arena. If they aren't taken care of, they will die just like anything else. Or if the master isn't satisfied with their performance...
But this story isn't about the arena itself. It's about a certain unlucky fellow who gets placed inside of the arena as a little... experiment.
(Writing this as a one chapter thing unless people want to see some more chapters of this. Just an idea rattling around in my brain.)