In a Euripides play, Creusa kills Ion using this substance, which had been gifted to the infant Erichthonius by the goddess Athena. For 10 points each:
[10h] What substance was deadly if drawn from a certain creature’s left side, but could raise the dead if drawn from the right? The bicephalic Amphisbaena was born after this substance was spilled over the sands of Libya.
ANSWER: Gorgon’s blood [accept the blood of Medusa; prompt on blood]
[10e] This son of Apollo used Gorgon’s blood to revive the dead, though he was later smited by Zeus for his insolence. A single coiling serpent characterizes this ancient healer’s “rod,” which may be mistaken for Hermes’s caduceus.
ANSWER: Asclepius [or Asklēpiós or Aesculapius; accept Rod of Asclepius]
[10m] In another account, Asclepius uses a herb he’d seen revive a dead snake to resurrect a child of Minos with this name. This name is shared by a sea-god desired by Scylla and a grandson of Bellerephon who swapped armor with Diomedes.
ANSWER: Glaucus
<KT, Mythology>