Impervium about to be teleported to Earth.

Impervium is an element appearing in the 1987—1996 animated series. In the Four Musketurtles episode, it is revealed that Krang's species sent the only known sample of impervium the Earth, where it was mistaken for a diamond and named the Star of Brazil.[1] Krang uses impervium to generate a forcefield protecting him from getting harmed by any weapon. However, the gem was thrown from Shredder's hand during his getaway, and was lost down a sink drain.


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