2018-5-4 · The Rock Grinder is a blunt-type weapon that Rynn can use in Drakan: The Ancients' Gates. It can be purchased from the blacksmith in the Valley of the Fallen for 5520 gold. The Rock Grinder is a blunt-type weapon that Rynn can use in Drakan: The Ancients' Gates. It can be purchased from the blacksmith in the Valley of the Fallen for 5520 gold.