Rumors were spreading about five groups of cats that existed within a forest in a far away land. At first they were only stories spread by mothers of house-cats and strays to try and courage their kits to stay healthy and exercise, but soon it was a well known tale that inspired several cats to try and start their own groups.
Most of these groups consisted with 5 or 4 cats who were previously friends, with no other cats having interest in joining and instead wishing to start their own groups. Meaning none of these groups were taken seriously and were treated no differently as an average street cat.
Years of this tale of 5 clans being told and revised before being retold once again caused the popularity of cats starting their own "clans" to die down. This tale now just being seen as a silly story to trick kits into being more healthy.
Until rumor got out of the fall of the 5 clans.
A strange cat soon arrived at the farm that a majority of strays liked to linger around, with the twoleg place that held kittypets only a few minuets of walking away. It was morning, meaning many cats were awake or lightly sleeping and were able to hear his cries for help.
When he arrived, many cats offered their help and he accepted their aid. He was badly injured, and despite the cats help, some of his injuries couldn't be healed. Including a back injury that made it so he couldn't walk without going through intense pain and a head injury that made him forget a majority of what happened to the clans and several other memories that didn't happen recently. He claimed to be a member of ThunderClan, and he went by the name of EmberSpark.
When asked what happened, he told them that "There was yelling. Lots of it. Many cats didn't make it out. They didn't let them. I didn't want to die. So I ran. I kept on running despite how much it hurt. I know they're all gone. And I don't know if anyone else survived."
Because of how vague his response was, nobody truly knew what events took place to supposedly wipe out the legendary 5 clans.
But soon enough, his words made its way through the barn and into the twoleg place, and soon enough, a group sprouted that successfully gathered a great amount of members. They called themselves EmberClan and decided to rebuild at least one clan, as well as deciding on what happened to the original clans. A majority of kittypets and strays moved into this new clan to try and rebuild what has been lost, leading to the rise of the final clan.