The weapon fired gold dust particles or even sometimes molten gold into the chest units of the Cyberman, plugging up their respiration system and suffocating them. The Vogans supplied the gold thanks to the gold supplies abundant on Voga. In retaliation, the Cybermen tried to destroy Voga, but they failed. They later tried to destroy what was left of the planet, but they did not succeed. (TV: Revenge of the Cybermen)
House of the Dragon Trailer - The Loop
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