From the outside there was no logical reason for Las Vegas to be there, it was located in the middle of the dessert with no real natural resources of note nearby. It was extremely hot, it was dry, if it wasn’t for air conditioning and the other “modern” technology it would next to unlivable.
However sin city was home to almost 700,000 people with millions of people coming to visit every year. They come for the lights, for the shows, the gambling, to do things that they would never do back home. For whatever happens in Vegas stays in Vegas.
None of them knew that this was a location chosen long ago by an ancient order of wizards and witches to hide one of the multiple mega shards which contained magical energy taken from the transformation of magical creatures both intelligent and unintelligent into “normal” creatures.
That was about to change, as a crew digging up ground for the newest casino came ever closer to the giant shard. If broken the entire city would be transformed.
By the entire city, it means the entire city.
The wizards had taken from ancient magical cities as well. So if broken, every human, animal, building and almost every item would be transformed in some way or another. To help stabilized the crystal the magical orders had contained similar types of magic together. So if this shard where to be broken, the entire population would be transformed into similar types of magical creatures. Be it mermaids/merman types, centaurs/fauns, elves/fairies/pixies, Demons/devils or animal hybrids types.
The shard is about to be broken and the sin city will never be the same.