Elemental weapons are weapons that have an innate elemental attack stat. You can only have one element at a time except for Warth and Imagine Dragon, which has 2 at the same time. However, Warth's second element is only an aesthetic change. In Infinity Blade, there is an extra attribute, Drain, which does not appear in Infinity Blade II. Also, if a weapon does not have a built-in elemental attribute, it can be equipped with one using a square gem (if there is a slot for it).