He led early Goguryeo through a period of massive territorial expansion, conquering several smaller nations and the powerful kingdom of Eastern Buyeo.
Daemusin strengthened central rule of Goguryeo and expanded its territory.
[6] In recent times, Daemusin served as a model for the famous Manhwa and video game Nexus: The Kingdom of the Winds.
As with most Goguryeo kings, little is known about Muhyul except for what is stated in some ancient Korean sources.
Some historians have inferred that the giving of such an extreme title to this man must mean that he led Goguryeo through many outstanding military accomplishments, possibly more than he is given credit for in historical texts.