What is "al-muqanna"

Hashim ( Arabic/ Persian: هاشم), better known as al-Muqanna‘ ( "The Veiled", died ca. 783.) He was among the first few to resist the Arab-imposed religion Islam, and he organized many attacks on Arab armies and took back whatever they looted. He was a chemist, and one of his experiments caused an explosion in which a part of his face was burnt. For the rest of his life he used a veil and thus was known as "Almughanna" ("the veiled one"). Dr Nafisi and Aryanpoor have elaborated on Khorram dinan. A Persian man who claimed to be a prophet, he founded a religion which was a mix of Zoroastrianism and Islam. He is viewed as a heretic by mainstream Muslims.