<P> The second is a particularly dangerous artificial brand created at Horizon Labs by Professor Sajani Jaffrey called Reverbium . </P> <P> Unlike standard Vibranium this faux material rapidly amplifies and projects sound and vibratory energy in pulse waves which would only strengthen over time before violently detonating . Max Modell, head scientist of Horizon at the time, ordered its immediate dissolution given how dangerous it was but Sajani held on to some of it without her team's knowledge . Reverbium would turn up again in the hands of A.I.M Scientists under the influence of Klaw, who'd used it in a new scheme against Black Panther and the nation of Wakanda; the faux vibranium also had the effect of enhancing his sonic powers to unknown degrees . </P> <P> When a small sub-molecular imperfection was introduced into Captain America's shield, each impact over the years spread to neighboring molecules . It grew until the molecular bonds of the shield were completely broken down, shattering the shield . The shattering effect continued to spread to other vibranium, unconnected to the shield . This created a vibranium "cancer", a shock wave propagating throughout the world . It violently detonated any vibranium it found, from mineral deposits to components of ships or equipment . The shock wave was traveling to the "Great Vibranium Mound" in Wakanda, where the resulting explosion could destroy the world . With the unwitting aid of the villain Klaw, Captain America was able to stop the cancer and restore his shield . </P> <P> Vibranium appears frequently in the Marvel Universe . </P>

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