Hadrium is an energetic material created by the Brotherhood of Makuta. It can be used to create a hadrium bomb. However, there is another type of hadrium, which is extremely unstable, and, if placed inside the core of a planet, it would cause an explosion powerful enough to destroy the entire planet. A quantity of it was teleported into Earth's core by Blackout's city-ship Darkmount after dozens of legions of Rahkshi reduced its cities to rubble. More unstable hadrium was used to destroy Bara Magna.
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