Blast Burn is an offensive Fire-type move. Only Archilles can learn this move. While powerful, the user must rest for a turn after landing a hit.
It can be taught by the Special Move Tutor in Tsukinami Village, at a cost of 4 Blue Shards. In 1.03, it could be taught by the Ultimate Move Tutor in Tsukinami Village for four shards of each color, and in versions prior to that, it could be taught by a tutor in Venesi City for free.