For 10 points, name this phenomenon that Prometheus gave to man.
This phenomenon was stored in a fennel stalk by a figure who tricked Zeus into accepting bones and fat. During Ragnarok, it will be thrown across the world by Surt. During the Exodus, God appears as a pillar of this substance, which was the form in which the Holy Spirit manifested on Pentecost. The river Phlegethon is composed of this substance, the gift of which Zeus punished by chaining a Titan to a mountain and having an eagle eat his liver every day. For 10 points, name this phenomenon that Prometheus gave to man.
This phenomenon was stored in a fennel stalk by a figure who tricked Zeus into accepting bones and fat.
fire [accept all synonyms such as flames]