Do it fair people.
Before Leeroy manages to crush the diamond, I snatch it from him and kick him in the face. Then I rush off toward the mountain
Little did Shafin know, that I have been working this mountain for 2 whole weeks, filling it with hollow sections and TNT, as well as a nice lava lake underneath.
As Shafin reaches the top and heads towards a nice little cavern, I trigger my Redstone switch and 100 blocks of TNT simultaneously explode, destroying the top layer and dropping Shafin through the sections I had hollowed out and into the Lava below.
Before he finally melted and was gurgling the molten liquid below, he tosses the diamond away in a mad fit in an attempt to save it.
Shafin disappears below the orange tide, as I collect the prize.