Death Mountain's Secret

is a Side Quest in.

Overview
Link is given this Quest by Dugby at the Goron Hot Springs. Dugby, who is found sitting in the Hot Spring, tells Link that he had buried a treasure near the Bridge of Eldin. He says that if Link finds it, it is his to keep. However, because Dugby's mouth is submerged underwater, his directions come out as gurgles. If Link visits the Goron Hot Springs at night, he can overhear Dugby mumbling in his sleep clearer directions to the treasure. The treasure, a Drillshaft, can be found hidden beneath a rubble of stones over a lava fall to the east of the Goron Hot Springs, which can be uncovered by using a Remote Bomb.

When Link brings the Drillshaft to Dugby, he is surprised to find that Link had found the treasure, but is skeptic about it. If Link shows him the Drillshaft he found, Dugby will confirm that it is the treasure. He then lets Link keep the Drillshaft. This ends the Quest.