Grond Peaksmasher was a little-known son of Hiatea and a true demigod - unlike the rest of the giant-kin progenitors - who was worshiped by the firbolgs of the Moonshae Isles. The Moonshae firbolgs believe that Grond carved the Moonshae Isles out of a single piece of rock and that the leftovers became the firbolg, while the rubble became the dwarves. They claim that the dwarves slipped him up and he fell into a crevasse that he'd cut with his axe and then a sheared-off mountaintop fell on him, trapping him there.