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Mastery are a thrash metal band that was formed in 2001 in Toronto, Ontario. Their debut recording, 2005's "Lethal Legacy", feature the band as an instrumental thrash act. Since this time, the group has added vocals to fill out their sound. In 2009, the band recruited vocalist Billy Milano (S.O.D., M.O.D.) and have recorded some songs with him.
(Bio written by Stooge)
