Timothy Showalter has a beard, an acoustic guitar, and a heartbreaking backstory-- on the surface, the confessional singer-songwriter start-up kit. But he'd prefer not to talk about his heavy history even if it would make you root for him. For one thing, he'd rather not relive some of the personal tragedy (a bad breakup, a house fire) that inspired his debut, Leave Ruin. But it also would obscure the otherworldly mythology he creates on Pope Killdragon, an astoundingly original twist on the loner-folk template.