Dragon Orbs are quite useful in the game. They are dropped by heroes when they die or when they are damaged. You can get them in every level of story mode and sometimes in Dungeon-a-day in the last question. So, you are probably wondering why they're useful for. FOR GETTING NEW PICKAXES OF COURSE HAHA! EVERY SINGLE ONE HAS A SPECIAL INTERESTING ABILITY! Neeat, huh? SO YOU BETTER GIVE THEM A GOOD OL' TAP TO COLLECT THEM!