Multiverse

This multiverse contains the alternate universes of Undertale; Underfell, Underswap, etc. Swarming with monsters and humans and entities alike.

Fantasy

The multiverse was created from the classic AU, Undertale. Many creators took their time in making the other universes. (Credit goes to them!!)

The most recent and biggest part of history is the creation and the X-Event, which took a big turn on how most people perceive this.

It all comes along with how the human and the monster world works - They have their own laws. However, outside of those, truces are made instead of permanent laws.

The magic system is limitless - you can use your power to your hearts delight! (just don't make it op tho-)

The level of technology varies, depending on the universe. For most, it is modern.

Undertale! The classic AU.