Power Miners was a LEGO theme released in 2009 and was the successor to Rock Raiders and was generally set in underground caverns. Two generations of the theme were released, in the first generation, Power Miners are deep in the crust of the Earth where they fight the Rock Monsters. In the second generation, Power Miners have drilled into the volcanic recesses of the Earth's core where team faces the Lava Monsters. The theme was discontinued in 2010.
2009 LEGO Sets
2009 celebrated the 10th anniversary of LEGO Star Wars and the 50th anniversary of the LEGO brick. New themes included Space Police III, Power Miners, and a revival of Pirates, while Agents 2.0 continued the high-tech spy concept. LEGO Mindstorms NXT 2.0 refined its robotics platform with enhanced sensors and programmability. The year also saw the conclusion of the original Batman line, Exo-Force, Mars Mission, and Belville, as LEGO phased out older themes in favor of new directions.