Sky stone

The sky stone was a small stone which fell from outer space, landing in a pea patch on the Martingale residence. The stone was a chunk of Green Kryptonite that had mushroom spores on it, this caused a large crop of mushrooms to start growing on Paw Martingale's farm.

The Raven had a Kryptonite detector and he located the sky stone with it. He tried to get the Martingale family to sell it to him but they refused, because it had became a family good luck piece.

Appearance
Super Friends (TV Series)
 * Season 1: The Menace of the White Dwarf