Buster (バスター) is one of the more important of Firebrand's fire powers in Gargoyle's Quest, Gargoyle's Quest II and Demon's Crest. It can break blocks that can't be destroyed by other attacks, giving access to new areas. It also has a higher fire rate and does more damage than Fire.
In Gargoyle's Quest, it is obtained after defeating Four-Eyes and obtaining the Gremlin Stick in the tower. Buster is useful against most bosses, and is the only power that can hurt Lucifer (Rushifell).