i've lost track of the number of times friendly fire has killed me. those grenades roll out of nowhere
My vote is for metamorphic. In this case, it was Kafka's Metamorphic. If you got that reference, you probably picked a college major with little earning's potential.
Usually i'd say igneous. Massive and solid as a block of granite. A point could be made for metamorphic as, like a sword, he's been forged and strenghtened by high pressure and temperature.