Fryus is the second dungeons (Goron Mines) boss, Fyrus came about when the Goron’s leader Darbus touched a Fused Shadow becoming corrupted. The other Gorons seeing his new form were forced to chain him up deep inside of Death Mountain, after defeating a Goron Elder in Sumo Link was allowed to enter to try to defeat and save Fyrus. Unlike other boss battles which are split up into phases this battle is just one phase, after beaten he drops a Heart Container and a Fused Shadow piece.