Universe 13
There is more than one universe in the multiverse, there are numerous types of universes. The majority of the universes are fairly similar to what you would expect: people trying to live their lives while being completely unaware of any other universe. Each world will feature both different and similar types of plants, animals, technology levels, societal systems, and so on. Even what they named their world could be the same or very different. In certain universes, magic exists. There are worlds where legends and elements from our deepest dreams and horrors come to life. Some universe cultures claim it is where their myths and stories originated.
In some circumstances, stories and legends may be true for someone by coincidence. That's because every now and then, a Veil opens between two realities, allowing something to travel between them. It's rare and doesn't happen very often in most universes. To say that most worlds are unaware that others exist. Only a few universes are aware of multiverses, and even fewer are capable of traveling to other ones. Then there is Universe 13, which is the anomaly in most of this. This universe's veil opened up frequently from all over the multiverses.
Universe 13 was one of the first to learn about the multiverse. The world has grown in its distinctive way. Most people live conventional lives, working nine to five. Technology is somewhat advanced, and space travel is moderate. However, the majority of the phenomena that occur are unknown to the world. That is due to the government and groups that maintain it from now on. which has created a secret world about their reality and all of its strange and unusual phenomena from the multiverse. So their myths, legends, and histories have been modified and changed to conceal the truth that they are true in most situations.