TRIGGER WARNING: EXPECT THE WORST JUST INCASE
The symbol of Abbadon squirms in your brain, with it you can summon Demons
Somewhere across the planes of the multiverse is a dimension comprised of unreality, where the local lifeforms have grown so bored that they're close to losing the will to live
One of the most powerful members of their species, Abbadon Of The Monarchs, in a effort to find some meaning in their existence, threw an experimental creation across the multiverse, at a world filled with weak beings that have tons of limits, and thus, have stuff to do
This creation was the Symbol Of Abbadon, which landed in the heads of multiple people across the globe during the start of the year 2000, and occasionally popping up in other peoples heads as time went by
These people, called Summoners, are connected to what they call the Demon Realm, and can perform rituals to call over an inhabitant of that realm so they can strike a deal
You're a Summoner, and you REALLY want something