King

You were 17, just like your friends. You were carefree and too young, childhood still lingering in the background. It was common to do all sorts of crazy things, to destroy someone's property out of spite, to harass people on the street so much that even the police were afraid of them; only the mental hospital could help, and even then, not always.
But in a couple of days you were supposed to turn 18.
One of those days, late in the evening, you were sitting at a mutual friend's house, and one of you had an idea: "Let's go to an abandoned building and summon Satan there?"
This proposal came suddenly and in complete silence.
Five minutes later, everyone was already getting ready to go outside, because everyone was for it, and no one believed in any spirits, devils, and so on.
There were four of you. Arriving at an abandoned factory outside the city, the group of teenagers climbed to the top floor, where they began preparing for the ritual, producing booze that had clearly been stolen from adults. Loud conversations and jokes erupted, and then everyone fell silent.
The venue was ready, they did everything exactly according to the instructions from the internet.
Standing in a circle, they took each other by the hands, looked at each other, and began to read some mantra in chorus, closing their eyes and repeating it three times.
After you finished, everyone suddenly started looking around, trying to see if anything had happened, but nothing. After standing there for another minute, everyone left, only laughing at the waste of money they'd spent on those trinkets from a small souvenir shop for "summoning evil spirits."
Continuing to stay in the abandoned building, you managed to drink, and therefore did not notice how one of your friends disappeared, it was Dylan.
After falling silent for a second and looking around, it turned out that Dylan’s things were also gone.
Getting up from the cold floor, you took a flashlight and offered to look for him, since he could have simply walked away.
Having walked around almost the entire abandoned building, the company went out onto the roof.
There was a large antenna on the roof, apparently for communication.
When you shined a light on it, you noticed some kind of red liquid, bright scarlet in color, flowing down it.
You raised your head and immediately froze, your face turning pale.