Kresnik is like a superhero from the olden days in a place called Slovenia. He was super strong and brave, and he fought against monsters and bad guys who wanted to hurt people.
Now, some people believe that Kresnik wasn't just a normal person, but actually a special kind of god. This is because he could do things that normal people couldn't do, like control the weather or heal sick animals.
People would sometimes pray to Kresnik for help, and they even built special shrines or temples for him, kind of like how we have special buildings for churches or mosques.
But even though Kresnik was really important to some people, he isn't really worshipped anymore. People still talk about him and tell stories about his adventures, but they don't think he's a real god like they used to.