A Mining Pick.
Skylanders can use Mining Picks to destroy rock formations in some of the chapters and Heroic Challenges of Skylanders: Spyro's Adventure. Mining Picks can also be used to attack enemies and destroy other objects, but will only deal 1 damage per hit. Earth Skylanders and Drill Sergeant do not require mining picks to break rock formations; most of their attacks can destroy them. Mining Picks reappear in Skylanders: Giants in Earth Elemental Gates and in some Heroic Challenges.
In Skylanders: Imaginators, a pick is used to traverse the Sensei Earth Realm, though it cannot damage enemies and breakables any longer.