Fusion-web was a Hyperion technology used to transfuse the energy of a sun into individual Hyperions to prolong their life.

The use of a fusion-web on a sun left it drained and led to the extinction of the inhabitants of its solar system. The wide-spread use of fusion-webs by the Hyperions led to the Great Inferno, a war that wiped out most Hyperions. (COMIC: Terrorformer)

Hyperion survivors of the war tried to install a fusion-web around Sol but were thwarted by the Twelfth Doctor and Clara Oswald. (COMIC: The Hyperion Empire)

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