Item from Malazan Book of the Fallen by Steven Erikson
Stone weapons carried by the undead T'lan Imass for three hundred thousand years — impossibly ancient, still sharp, held by hands that forgot how to let go.
The flint swords of the T'lan Imass are weapons from before the invention of metallurgy, carried across three hundred thousand years by undead warriors who swore the Ritual of Tellann and forgot how to die. Tool — First Sword of the T'lan Imass — carries the most famous of these blades, and in his hands it has killed Soletaken, Jaghut tyrants, and beings of power that would shatter steel. The weapons are impossible by mortal standards — stone should chip, crack, and break. But the Ritual of Tellann preserved everything about the Imass, including their tools, locking them in the moment of their oath. The swords don't wear because the Imass don't age. They are artifacts of an era when the world was younger, carried by warriors who have outlived every civilization that followed their own and are still walking.
A broad-bladed sword of knapped flint, the edge sharper than metal despite being stone. The blade is grey-brown, translucent at its thinnest edges, with the characteristic conchoidal fracture patterns of expert flintwork. The hilt is wrapped in desiccated leather that might once have been hide from an animal that has been extinct for a quarter million years. The weapon looks like it belongs in a museum display about the Stone Age. It doesn't care.
Also known as: Flint Sword, T'lan Imass blade, Tool's sword, stone sword