Path of the Planebreaker (5E)

The Planebreaker visits all planes, all demiworlds, and all dimensions.
Some are known to sages and planar travelers. But in a multiverse
stretching across epochs, the number of previously uncatalogued planes
is vast. The Planebreaker races through all of them, in time, and the
Path that trails behind it creates a route that links them all. Path of
the Planebreaker introduces this enigmatic interplanar object that
unlocks access to the planes for characters of all levels.