Fire

Fire is energy produced by oxidation.

The earliest splinter of Scaroth showed mankind how to make fire. (DW: City of Death)

Ian Chesterton showed Za how to make fire. (DW: An Unearthly Child)

The Doctor accidentally inspired Nero to start the Great Fire of Rome in 64. (DW: The Romans)

The Doctor saw an alternate Earth consumed by fire. (DW: Inferno) This memory was used against him by a mind parasite. (DW: The Mind of Evil)

The Doctor accidentally started the Great Fire of London in 1666. (DW: The Visitation)