Milestone

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A milestone is an achievement on a Promethean's Pilgrimage that allows them to come a step closer to Mortality. They are often a reflection of a character's short and long-term goals, and are emotionally significant to the character in some manner. A Promethean who achieves a milestone through their actions and understanding will recieve Vitriol; the larger or more important the goal is, the more Vitriol they recieve. The Promethean can then use the Vitriol to further improve themselves or store it in an Azothic Athanor.

• PTC: Promethean: The Created Rulebook, p. 190-194