Final Fantasy 4 Pixel Remaster Walkthrough 16

In this edition of my Final Fantasy 4 Pixel Remaster Walkthrough, the group goes into the sealed cave. They obtain the dark crystal, but spring a trap. The group defeats the demon wall and at the entrance, they are betrayed by Kain. He steals the dark crystal, meaning Golbez now has all 8 crystals to activate the tower of Bab-il.
This walkthrough contains commentary.