I am currently working on a fantasy world setting and I had this idea about a world having a different sun every day. There could be around 3-12 suns in total, and every day, a different one would rise and set. Each sun would have, say, a different color, size and brightness but there would not be major differences between them. They can come in a specific order that gets repeated, or come randomly, I don't mind. Moreover, there would be days, unpredictable, when no sun would rise, leaving the world in darkness until the following day. These dark days would come 2-4 times a month on random days.
Is there any way that science could explain such a phenomenon, or at least something similar? It is not mandatory, but I would like a scientific explanation if possible, even if I have to modify this idea. This fantasy world exists in a larger science-fiction universe, so this phenomenon could be created artificially by other more advanced civilizations. Also, I describe the phenomenon from the perspective of people on this planet, so I don't care what happens outside of it to make it work.
EDIT: It doesn't even have to be actual suns, but it could very well be things that look like suns and give off enough heat and light for the civilizations to survive (as long as the planet is still in orbit around something).