Charcoal
From Tardis Wiki, the free Doctor Who reference
Charcoal was one of the unorthodox ingredients which Moses of Tyre included in his creative attempt to replicate "Greek fire" in the 12th century as part of a battle against Krynoids. The result was a more potent, explosive substance. (AUDIO: The Green Man)
The Saxon Master referred to one of his previous incarnations as "Mister Charcoal Grill". (PROSE: The Secret Diary of the Master)
