On @Beowulf 's advice, I return to the Mana Fortress. To my surprise, Jema is here, and gives the party a quick pep talk, and directions to find the Mana tree itself! I find Neko's shop, but the armor is too expensive to buy even one set! I decided to hold onto one piece of the body armor and helm, in case the upcoming fights prove too much. I try entering the flying fortress, only to be shooed away! I keep looking around the world map, until I find a conspicuous island with a small clearing surrounded by tall mountains! Turns out, it's the dungeon they're supposed to go to! It's filled with exceptionally nasty enemies that punch anyone for three digits of damage, and I was immediately glad to have bought the new set for Revi. Of course, now I needed to grind out the money to get it on everyone. What a pain! Thankfully, Revi was capable of soloing the monsters with the new armor on, so I painstakingly grinded out all of the required money with him. This took him all...