Is the reference in the Elemental Fist feat to "Elemental Strike" a typo, or is it referring to something I cannot find?
Not so much a typo
As I see it the author figured people could figure out on their own that elemental strike meant "an attack using this feat"
At least that's how I see it
Either way you are not the first person to ask this and no it's not referring to something you cannot find :)