after the giants war II

In the nowhere lands ,even if the dead giants are gigantic,they are sometime very hard to find...

And this is the case here; the once known as "the walking cannon" is resting in the middle of nowhere hidden by the north mountains. It was believed to have a kind of armour that is like half bone/half metal and almost indestructible.
So seeing this ,we cannot really imagine what kind of energy damaged it that way...
Just below the empty shell, there is a temple made in the very same material and it is believed that in it's basement is kept a giant crystal that was once the source of this giant beast...