In an old episode Ken & Robin talked about adventurers eating the monsters they kill, or even selling the meat as a foodstuff. Rather to my surprise they did not mention the possibility of getting powers and benefits from the ingestion of magical monster bits. My mind flew at once to Fionn mac Cumhaill and Taliesin burning their fingers on the salmon of wisdom and putting their fingers into their mouths, to Sigurd or Siegfried roasting and eating the heart of the dwarvish dragon Fafnir/Fafner, or Sigurd bathing in Fafnir’s blood to become the Northern Achilles. I even thought of Herakles’ arrows dipped in the blood of the Lernaean hydra and his shirt dyed with the blood of Nessus.
Is there anything else of the kind? Do you get anything from eating a phoenix?
Has the theme been used in fantasy RP that you know of? Have you used it? Could it be?