My own personal extremely self-indulgent Underverse inspired au.

During a rare time of peace between The Guardians and The Dark Kingdom, the appearance of two monsters stirs up tension once again. Zero, taken under the protection of The Stars, is being hunted down by the ever-persistent Strike, who has been forced to align himself with The Dark Kingdom.

The Outlanders also strangely seem to be getting involved, though their intentions are unknown.

The Guardians (Formally named the 'star sanses' but I always thought that sounded a little silly), consist of Dream, Cross, and Bird. The Guardians used to be Dream, Ink, and Swap. Though they had a falling out and decided it would be best to part ways.

The Dark Kingdom, is Nightmares kingdom of course. He claims ownership of his own little section in the universe, feeding off the negative energy there. He doesn't really get involved like he used to, preferring to send out his mercenaries to do his dirty work. His mercenaries consist of Killer, Dust, Horror, and others.

The Outlanders are a neutral party that prefer to not get involved in the squabbles between the other two. They consist of their leader, Cipe, and his assistants/guards Axol, Finch, and Leander. (More may be added later maybe)

There are some more independent monsters that have a part to play, some of the notable ones so far are Ruse, an opportunist that loves to stir the pot between The Guardians and The Dark Kingdom for his own profit. As well as Seren, a neutral watcher that carries a godly presence.