Irdizar, otherwise known as the Farpath or the Ethereal Plane, is one of the major planes of existence in the multiverse. Irdizar is a sprawling plane that functions like an expansive road between a large amount extant universes, but is itself a multidimensional construct that exists in multiple spaces simultaneously.
The Farpath is often considered to resembles "folds" in the perceivable dimensionality of Adzeredish, and traveling deep into the Ethereal Plane allows one to move nearly instantaneously across unfathomable lengths of space that the traveling individual is capable of comprehending.
Notably, Irdizar does not connect to certain planes that are known to exist, such as the prison realm of the goddess Irashi.