Multidimensional Threats are one of the most powerful and dangerous types of villains, being a threat to the entire multiverse or omniverse. They tend to try to cause problems across several universes for either conquest or destruction. They are several types of threats such as:

• Multiversal Conqueror: A villain seeking to conquer the entire multiverse, if not the whole omniverse for whatever the goal is (power, destruction, or for the sake of chaos and violence). They tend to vary, commonly a powerful cosmic being, a malevolent deity, an eldritch abomination, a demonic force, or an evil variant with power or tech who discovers other universes.
• Alternative Reality Counterpart: A character who's either an evil variant of the hero or someone else from the main universe who would cause problems for the other verses. They are like Twins/Clones of the person who lacks any of their admirable qualities, but possess their skills and power making them a dangerous threat.
• Interdimensional Destroyer: Overlapping with the Omnicidal Maniac/Cataclysmic archetype, instead of just destroying all life in their respective universe, they decided to destroy other universes as well. Multiversal Conqueror can overlap with this type depending on the scenario or methods of their goal.
• Chaos-Bringers: A type of multidimensional villain who seeks to bring chaos and anarchy across all dimensions, typically an interdimensional entity with a trickster like mindset who delights in tormenting others for the sake of it.

Aliens and reality warpers tend to typically be this as they boast the power to be a threat to all other realities beyond their own.