The Stairway Fiend

The Stairway Fiend is really dumb like why tf is it locked behind a door like you're supposed to be able to use stairs wtf anyway if you manage to open the door and try to climb the stairs you will trip and fall to your death so maybe don't do it idk. What is above how under it is unknown. Some people think it's a space that isn't even in our universe, like a gateway to another dimension. I think that's stupid.

Powers
The Stairway Fiend's powers always involve stairs and suffering. You fall down the stairs? It's its fault. You get stabbed by some guy in a stairway? Its fault. Also when you climb stairs and after you're exhausted for no reason and you're like "wtf am i really that out of shape" its also its fault.