This is a rough depiction of a brief scene that appeared in a dream I had.
Having managed to shrink every town and city in Equestria, Trixie quickly finds being the most powerful unicorn left to be boring as there’s no challenge, although it might be that her antics with the diminished populace have grown tiresome for her. She doesn’t even consider restoring even one pony to normal size and she’s certainly not going to shrink herself, so what will she do to alleviate her boredom without ending up in the same place in the coming days?