The Lichs' Ambition

The Multiverse is a conglameration of all the Planes of Existence: the Material Plane; the Inner Planes that include the the Planes of Fire, Water, Air, and Earth; the Elemental Plane of Chaos; the Outer Planes of Alignment and Deity; the Transitive Planes like the Astral and Ethereal Planes; shadow Planes like the Feywild and Shadowfell; the Nine Hells, the Abyss, and the Domains of Dread; and countless other realms and territories that exist beyond the mere comprehension of ordinary beings. This is our known universe, rich with possibilities and diverse in its complexity. But what if there were limitless other worlds beyond a previously unblemished veil, each with its own unique characteristics, civilizations, and mysteries waiting to be uncovered? An infinite number of other dimensions, perhaps similar yet vastly different from our own, exist just out of reach, tantalizingly close but still shrouded in mystery. They are there, hidden from our understanding, but we just do not know how to pierce the boundary that exists between them. What if a brilliant planar wizard, known for his eccentric experiments and boldness, has figured out how to open a doorway into the realms beyond? Imagine delving into the 5th Dimension, a place where the rules of reality bend and twist, where time and space are reshaped in ways we can only begin to imagine. This adventure involves epic fights with vampires, cunning liches, and other dark forces in a complex plot to destabilize not just one, but two worlds that are on the verge of colliding. You must embark on this extraordinary journey to the beyond, fueled by curiosity and the desire to uncover hidden truths, while also facing the lurking dangers that threaten not just your existence, but the fabric of reality itself.  This module includes unique arcane artifacts to help the party survive, and new monsters not known in the 5e Multiverse. This adventure is suitable for 17-20 level characters.