Flaming Oil

Flaming oil is a simple incendiary weapon used on Britannia, which functions somewhat similarly to a contemporary Terran Molotov cocktail. Flasks of this substance appear in Ultima IV, V, VI, and VII.

Description
Flasks of flaming oil create a sudden conflagration upon impact, resulting in a fiery field which may block the advance of an enemy. Volatile and unreliable in its effects, this substance was generally used as a weapon of last resort by those desperate to escape a battle with their lives, and it fell out of use toward the late Age of Armageddon.

Trivia

 * In Ultima IV, enemies killed with flaming oil did not grant experience points.