“The Sacred Flame, or Flame of Life, was the heat source that created the life-prolonging Elixir...Sacred Flame
“Praxis gas was a type of gas in the praxis range. Celery would turn purple in praxis gas. The...Praxis gas
“The Twelfth Doctor claimed to know of a race made of sentient gas who threw fireballs as a...Sentient gas
“In theory, Stahlman's gas, named in honour of Professor Stahlman, was a source of energy found...Stahlman's gas
“Radmium was a substance that the being Zodaal was made of. Radmium acted as a corrosive agent...Radmium
The following 39 pages are in this category, out of 39 total.