Azbantium

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Revision as of 00:07, 6 December 2015 by 152.17.145.45 (talk) (It took four and a half billion years to break through the confession dial, not two)

Azbantium was a mineral 400 times harder than diamond. A twenty feet thick barrier of it appeared within the Twelfth Doctor's confession dial. In an effort to escape his confinement, the Doctor wore it away by pounding at it over a period of four and a half billion years. (TV: Heaven Sent)

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