Pylosian Mint

Poison
Pylosian Mint is a poison used as an ingredient in the Physician's Cure.

The Blood of Olympus
In The Blood of Olympus, Frank goes with Piper to find the Poison of Pylos, and Frank gets it from the other descendants of the prince of Pylos(Frank is a descendant of the prince of Pylos, too). After the crew of the Argo II finds the other ingredients of the Physician's Cure, Jason, Leo, and Piper go to visit Asclepius, the god of medicine, and he makes the Physician's Cure for them, containing Pylosian Mint.