As a matoran, carbon was always the smarter one out of his friends and knew almost anything about the earth and soil of the planet. He worked in a newly discovered mine. One day he decided to wander off deeper into the undiscovered parts of the mine. As he went deeper and deeper into the core of the planet it got hotter and hotter.Soon he came to the point where his armor started to melt off, but he kept on going. When he couldn't go any farther he sat down and fell unconcious. Then the heat began to affect him. It almost completley killed him but diamonds and other minerals melded with his bio-mechanical parts and tissues to give him strength. He then arose from his slumber and noticed his new body and strength. Awestruck he climbed back to the surface.
From then on he was known as Carbon toa of heat and pressure because of his ability to withstand immense heat and pressure. He also has the power raise the heat around his enemey to melt off his armor thus harboring him weak and vonurable.