Bukkit

Transmutation Path

With the /transmute command, players can take any item in their hand, and turn it into the next item in the transmutation path! But, there is one catch; every time a player uses the transmute command, it has a chance to fail. When the transmute command fails, it takes your items, and gives you nothing back in return. As you move higher up the path shown below, the chances of failing become greater.

Dirt -> Cobblestone -> Smooth Stone -> Iron Ingot -> Gold Ingot -> Diamond -> Emerald