Etymology: endo- inner, mestrol- a altered form of Maestro, composer of sound/music.
History: On the 20th of April, 2013, on a video by sjin called Ninjas #8, a user called stardude655 stated the following: "The reason that Rythian exploded is because of the excess of energy absorbed from Duncan's precision ultraviolet-beam causing an exothermal dynamic meltdown making Rythian implode in an endomestrol explosion." A response followed, by JONNYELVIS7 stating:"When you google "endomestrol" the only result is this video. Just though I'd let you know you broke google." And in result, a need for a meaning of this word was created.
The thermal displacement beam was shot, and was integrated into the wizards body. An endomestrol event occurred, and the wizard imploded, after taking too much heat from the laser.
The black hole absorbed tons of mass, ripping them apart, transmuting it into energy. With each bit of energy, endomestrol explosions were made, but, as space is a vacuum, the deafening sound was not heard, ironically.