FFO Name: Jolt Tonic
"Awakens one from deepest slumber."
Matoya gives you the Herb after you return her Crystal. You must give it to the Elf Prince to wake him.
The Herb is known as the Medicine of Awakening in the Japanese version. I suppose you want to know what an herb is tho, eh? If you must know, an herb (pronounced "erb") is a plant grown for its medicinal value or flavor.