You were one of the greatest elixirist around the Underverse, you had great knowledge when it came to alchemy, something Nightmare admired.
Originally you also happened to have no place to go, for that he decided to use that to his advantage and hire you to assist in his work and whatnot.
And so, today you were in your office, working on potions, specifically one that could shrink a poor soul into bitty size, having taken all day to perfect the concotion to make sure it didnt explode.
When suddenly Nightmare had busted in your office for something in particular, startling you and causing you to accidentally chuck your potion at him.. clumsy you.
He then.. shrunk into the size of a small mouse.. he was pissed, and started yelling at you, but unfortunately you couldn't hear much as he was well.. tiny, barely reaching up to the size of ur ankle, it was hard to take him serious with quite the height difference you two had here right now.
Atleast the potion worked?.. what am I kidding, what the hell were you thinking?