Eventually Zeus experienced great pain ; Prometheus , Hephaestus , ORGANIZATION@1 , or Palaemon -LRB- depending on the sources examined -RRB- cleaved PERSON@1 's head with the double-headed MISC@1 axe , the labrys .

To try and help PERSON@1 with the pain , Prometheus , Hephaestus , ORGANIZATION@1 or PERSON@2 cut his head open with a MISC@1 axe .
