Monster from Another Dimension.

It arrived one day, able to teleport, to go back and forward in time, able to create matter from out of thin air. Although it has a childish voice it's something out of anyone's understanding, disconnected shapes swirling and flickering.

Sometimes one of its arms would protrude, that's when I know it's going to create a death ray or a monster. The first time we met its creations were rude and childish. As time passes it's getting better and more ingenious.

I have never exactly known how to stop it, sometimes it would get bored and go. The second time I tried ignoring it, but that's when he unleashed an alien armada on the city. It would come and go exactly once a month.

I talked to Dr. Furthest, the world's leading scientist, and after some dealing with his fancy charts and schematics I could understand what to do.

That thing comes from another dimension, one where things have an additional plane of existence, more than just height and width, and it's once a month when it intersects with our flatland.