As much as I'm a fan of "Metalocaplypse", your selection doesn't include the word "plasma". Furthermore, and no offense, but I don't think plasma is an element. He's probably looking for "iron".
Suzanne Vega - "Ironbound / Fancy Poultry"
And I'm sorry, but I don't see how a riddle serves as a Jeopardy-like trivia question. I'll answer it anyway... "tomorrow"
Shadows of Knight - "Tomorrow's Going to Be Another Day"
Q: George Washington Carver was famous for discovering a multitude of uses for this legume.