It wasn't long after Lina strapped on the belt the daggers came with and slipped into the chain shirt that she heard a loud gong ring.  As soon as it did, the gate slid into the ceiling, revealing the arena itself.  The floor was covered with sand, though in a few places she could see solid stone underneath.  Four large stone pillars rose from the floor, going a good fifty feet or so straight up.  The entire arena was a large circle, walls rising around fifteen feet and giving way to seats, with a fairly large crowd watching the arena.  At the far end of the arena, about seventy feet away, the other door was open and a kobold, holding only a simple club and wearing nothing but leather tatters for armor, walked into the arena, looking around at the crowd with obvious fear.