Multiverse

"Who are you in this vast Multiverse, Mister Strange?"

- The Ancient One to Stephen Strange

The Multiverse is the collective of all realities and parallel dimensions in existence.

Sorcerer Supreme
Agamotto became the first Sorcerer Supreme and dedicated his life to protect the Earth realm from extra-dimensional threats.

Mass Discovery
Humans, during the 1940's, began experimenting with nuclear energy; during one such experiment performed by Isodyne Energy, a rift was created where a substance dubbed Zero Matter entered this dimension. Eventually, the scientists Whitney Frost and Jason Wilkes became infected with the substance. Frost actively sought more of the Zero Matter and reopened the rift; however Wilkes entered the opening. Upon his return, he described his experience in another dimension outside the Earth realm.

Attack on the Sanctums
To be added