How to find fire crystal once you free settlements in Bahara

[Nikst*r]

*EDIT* it's okay, it wasn't in the temple, once you save the villages, the Bahara pyramid become activated as a cave**
So after the forever wait for the soldiers to undo the glowing orange domes in the villages of Bahara, the King then says the fire crystal is hidden in a cave T_T I'm guessing it is the Temple of Osiris, as that is the only cave in this land? But where?

[Zelrune]

Ok, once you free the settlements if you look at where the desert city, the fire crystal is in the big pyramyd on the opposite side of the map. Go inside, and you will see a sort of temple further in but not past the Sphinx at the end of the tunnels. The crystal is hiding behind the temple.
Sometimes it glitches out though and disappears, of all my playthroughs it's been the most unstable thing for me. Hopefully that gets patched soon.