Walkthrough

Talk to Rush to see a scene and get your dragons to appear. Go to the lower left, face down, and hit A to jump onto the roof, where the salesmen will appear. Equip, buy, feed. Bikkebakke has his mushroom shop, and talk to him when you're ready to leave. Because of all the cool loot I got in the last few battles I was already fully equipped by now. 8-) Whenever that happens, buy up mushrooms to feed to your dragons (even if the elementals are at the max, the Rotten Mushrooms also raise Dexterity, and Gross ones raise Mind.)

Yoyo's back, so be sure to put her and your new assassins into formation. This is a good battle to bring Mini-Devils with... if they happen to do Complete Heal All, you'll heavily damage most of the (undead) enemies and completely heal yourself and your MP! Don't forget that your Priests (if there's at least three in one party) can use White Drug to do major damage against the Revenants and Wraiths. Get the Royal Chimera from a distance until it's almost dead. It's probably better to go in up close for the Soul Cage; use fire attacks or Holy attacks (if you have them). All in all this isn't too tough.

After the battle and the scene, run upwards, then talk to Yoyo twice, then go up again. After this chapter, Yoyo and Sendak can summon Jormungand.