Usually, inter-dimensional travel is not something that just… happens. It requires preparation, an eye for details, and enough power to bypass the barriers between worlds. Something that it's not easy.
Also, if done wrong, it ends with the recipients a smear of indistinguishable matter on the dimensional walls that surround a reality, so. Not something that many attempt.
In certain times, however, a series of consequences make inter-dimensional travel possible. Never easy, but easier.
A Grand summoning of heroes to save a planet. Direct divine intervention, be it good or evil. A particularly rare alignment of celestial bodies. Or in this case, a giant, man-eating, demonic tree which decides to snack on an entire city in order to grow a single fruit that would grant the power of a god to whoever would eat it.
So, usually run of the mill demons don't have the power to summon things from different realities. On the other hand, when there is such a demonic tree the size of multiple skyscrapers already breaking down the dimensional barriers between Hell and Earth, the situation is… a lot different.
So, this demon hatched a plan. It decided to summon a certain number of mortals into Hell, spin a story that they had been abducted by a demon lord, and they needed to kill it to return home.
It was a lie, of course, for those that haven't already understood this.
"But worry not, worthy people." The demon would say, not showing themselves.
"I have been tasked with giving you enough power to survive and grow, so that you can kill the Demon Lord!" Red orbs would then fall at their feet, while a sinister glow would shine from inside them, making them feel… stronger, powerful, on top of the world even.
"You can use this ancient relic to strengthen yourself with the energy that you would gain from defeating the smaller monsters under the Demon Lord!"
This was, strangely enough, the truth. On the other hand, the gold statue of a woman with a lion mask carrying an Hourglass had such an aura around it that it was pretty clear that it wasn't just an oversized paperweight.
"Fight! Win! Grow! Kill the Demon Lord at the center of this realm and go back to your home, with all the powers you've gained!" And then the voice would disappear, leaving the six groups of exactly One Hundred and Eleven people in various parts of Hell. One such group found themselves in a strange, fleshy room with a single door on the opposite side from the Statue.
Now, the demon that had summoned these people was neither a base demon nor a stupid one. No, it was a Lusachia. Despite being an amorphous blob of mouths and atrophied muscles, it was a specialist in magic and had more than enough power to be a threat. So it knew what it was doing in its attempts to evolve into a greater demon, maybe even a Lord at that. Hence why it summoned people that had very specific psychological profiles, such that they would not attempt to think too much about what was happening. The demon would just lose a bit of power now - planting a small seed of it within the souls of the summoned people - for big returns later. The power was still the demon's, after all, it just needed to safely grow. After that, the Lusachia could just rip it out and recover the initial investment with more than enough interest - and all without risking its own life.
It was an admittedly ingenious plan. Of course, we all know that the plans of mice and men - and in this case, demons - often go awry.
Like in this case. As unfortunately for this demon, two of the people who were caught in the summoning spell had a more... outside perspective of things.