According to myth, in order to allow him to weild the
Wings of Needless Sorrow, every living thing on
Earth leant their magic to
Agamotto, making him the first
Sorceror Supreme.
Beings with equivilent powers to a Sorceror Supreme predate Agamotto's life, such as
Ire of the Crua before the Ice, but he is usually considered to be the first to use the title.