I’ve been meaning to make lore about this.

Demon-bot explosion.
In 1973, there was a spotted 1 light hovering over the sky in random directions at night. It was changing colors, it was twinkling the entire spectrum. It was classified as a u.f.o and many suspected it to be aliens or some ridiculous ideas. But that was completely ruled out when it was discovered to be a bright light over 5 billion light years away shining and moving in random directions. It was spinning, and it was moving in a very weird motion.
At about 3 am in the morning, it started to move faster. Much much faster. Until it became so fast it was unfathomable to see its movement, and it appeared to look like a star like everything else. It blew up minutes after. It was observed that all stars around 5 million light years close to the distant object immediately shut off, and their light never appeared again.
Its not known what object this ever was, and its unknown if it was even an explosion. If the light flashed, it would be easily classified as a supernova or etc. But the light just disappeared, and so did stars around it. No flash ever happened.