Ishi-Ishi

Ishi-Ishi was an akki vigilante who lived in the Sokenzan Mountains of Kamigawa. He was a renowned crackshot, and he constantly used his sling to hurl flaming pebbles at the kami invaders of his mountain home. He was apparently fond of goats: whether as steeds or dinner (or both), it's not entirely clear. He once flew over the Sokenzan Mountains on his goat mount and found the persimmon tree of plenty. He was eventually killed by the Mountain Kami, his body incinerated. The akki carried off his shell, but they left an inscription at the cave of his demise: "Here fell Ishi-Ishi, King of the Flaming Pebbles, Scourge of the Mountain Kami, Lover of Goats. May his shell never burn."

Interestingly enough, "ishi" is a Japanese word meaning "stone."