To clarify something I've gotten PMs about, attacks caused by an Assiah, Yetzirah, or Beriah deal spiritual damage as well as whatever physical component there is to it, as your existence is being attacked by a foreign desire. This means that, as explained in the Vitality stat description, the only way to reliably kill someone in Naraka is through use of your own desires, rather than through buying a gun online and shooting them in the head.