Okay, so maybe it wasn't just the landslide covering the road that made Hedge quit the oil business.
The trip to the cave that the landslide proves harder than the actual Oil Cave itself. There's quite a bit of treasure in there that could at least potentially be good. The only downside is that Hedge also conveniently forgot to mention that there was a dragon guarding the Power Oil. At least there's an accessory in the cave called the Dragon Ring that's a good idea to use on Aguro.
There are also quite a lot of battle items with the word “dragon” in the name as well. You'd think they'd work well against a dragon, but no such luck. A good strategy instead seems to be putting the Dragon Ring on Aguro and spamming it with spells that reduce the dragon's defense. It's still a hard fight, though.
Surprisingly, Lufia's Thunder spell works really well as an attack. I've always thought ice attacks were better attacks, but I keep forgetting that that's not always the case. Jerin's Mirror spell comes in handy, too, because it can reflect two-thirds of the boss's attacks, all of which are oil themed. Of course, this is to be expected, since this whole quest has been. Even the boss is called the Oil Dragon.
Once the Oil Dragon is taken out and the Power Oil is claimed, it's back to Epro to save the game. Technically, we need to take the oil to Professor Shaia at Lab #4, but for now, I've gone far enough. Actually getting to the lab and fixing this thing will have to wait until next time.
So, until then, stay safe, have fun, keep gaming, and DFTBA! Hopefully, I won't be away for so long next time.