Impregnium X is a super-strong material.

It is first seen in The What-the-Fuckiest Five Minutes of My Career So Far, in which the TV program Super Dirty Jobs features Makro cutting a block of the material with a superstring bandsaw.

In Excessively Talkative, Major Havoc metaphorically refers to the substance, saying that the Superhomeys "gotta be harder'n Impregnium X" in punishing Willy Pete for transgressing the unwritten rules by killing capes.

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