A few days" worth of explosions later, he concluded that creating a wand that did not burn out in a few seconds turned out to be far more difficult than he expected. The only combination that lasted more than a dozen seconds was ironwood and a mixture of powdered dragon scale and a sliver of dragonglass. But it also turned into ashes after less than four minutes of use. Ironwood was ridiculously hard to work with. He had broken half a dozen steel drills in the making of three of those wands. Jon then shelved the wand-making project. Twelve minutes of wanded casting was more than enough in case of an emergency.