Going into its second installment, the CAO Arcana series, which emphasizes unusual tobacco, has a new release that contains a tobacco that’s been fermented through a rather obscure method—being buried in the ground. The new blend is called Firewalker and the defining, earth-fermented leaf is found in its Nicaraguan filler. According to CAO, the filler, which is grown in Nicaragua’s Mastepe region, is assembled into a pilón and then buried in the volcanic soil for two months. After that, the tobacco goes to the factory for nine months of secondary fermentation.