Our next stop is Baron castle. Remember where you met Baron king? For some reason he became Odin, one of Rydia summon. Odin has a unique attack that can kill enemies instantly but the chance he uses it very low.

Boss: Odin
Just fight him normally until you see Odin raise his sword above his head, be prepare to have everyone Defend.

Give Darkness to Cecil, this will come in handy in second and third playthrough.