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A catalytic extraction chamber — also known as a distillation chamber — was a device for cannibalising life energy from others. Magnus Greel, a 51st century human, travelled to the 19th century where he experimented with the device. In 1889, he had Li H'sen Chang kidnap woman to be placed in a chamber. Greel hoped to revert the damage done to his DNA, caused by time travel, by distilling their life essence and imbuing himself with it. The Fourth Doctor threw Greel into the device and it sucked out his life force. (TV: The Talons of Weng-Chiang)

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