…oh no, my good pants
The Doclopedia #1,177
The Truth About Monsters: Demons
In the pocket dimension known as “Demarra”, the beings that we call Demons look and act surprisingly like we do. Indeed, if you were transported there safely, you’d fit right in.
The key word there is “safely”. You see, transporting between realities via magic is inherently unsafe and it is doubly so when going from or to most realities and Demarra. The magical energies warp and restructure your body while filling you with great power. When a Demarran arrives here, they look, well, demonic and they are under the control of the summoner. The same thing would happen if we went there, but Demarrans don’t practice magic.
Needless to say, the Demarrans hate being summoned and used for fouls purposes. That’s why they try like hell to kill the mages who summon them, something they do with increasing frequency of late. In fact, the government of Demarra has instituted mandatory “Summoner Eradication” classes for all citizens.
So stop summoning Demons, mages! Go back to making deals with dragons and liches!