After they follow Tornix/Trinicus into the tomb where Dhaos is released, Cless and Mint find themselves in an unfamiliar place.
When you're back in control, go into the town. Go north until you see villagers.
The next morning, talk to Lenios's wife to get a bigger food sack. Now you can hold 2200 food units.
Go outside, and go to the southwest part of town. Go behind the item shop and go down the left side to find two chests. From left to right, they contain an Orange Gummy/Orange Gel/Orange Gummi and a Remedy Bottle. Then, at the weapon shop, buy a Sharp Sabre/Saber and upgrade your armor. In the weapon shop, there is a secret passage in the right wall that goes up and around the back of the counter. Talk to the kid while you are behind the counter to learn a new skill.
You can optionally go south from Beladum to enter Spirit Forest, where there are some items that you can find. From the forest entrance, go south and east, and you'll see a chest sticking out from under the leaves of a tree. It contains an Orange Gummy/Orange Gel/Orange Gummi. Then go to the leaves of the tree to the south of that chest and check that area to find a hidden chest that contains a Sage. Go north from there, and you will find another chest, which contains an Hourglass. Then go south to the water, then east, then north to the tree where Cless/Cress saw the vision. There is a chest to the left of it that contains a Reverse Doll.
If you wish, you can level up and master skills near Beladum, and rest for free in Lenios's house whenever you need to.
Before you go to Euclid, you can go to a dock northeast of Beladum to find some chests. The chest on the leftmost side contains a Spy Lens/Magic Lens, the chest in the top middle contains a Life Bottle, the chest in the middle center contains a Steak, the middle bottom chest contains a Mystical Rune (equip this on Mint right away), and the bottom right chest contains an Elixir.
When you're ready, buy any items that you need, and go north, through the mountain pass. The hard route isn't difficult now that you have leveled up, and you will not get much experience from it. But if you didn't get the chests on the hard route before, you might want to do so now. Go north from there to Euclid.
There is a girl under a tree near the south entrance of Euclid. Talk to her, then walk toward the Inn, to start an optional side quest. In the SNES version, the side quest is just for plot and doesn't affect the gameplay, but in other versions, you will get a reward if you complete the side quest. If you want to do the side quest, listen to the girl and help her out.
Go east and north around the east side of the inn to find two chests. One is under the uppermost tree. From left to right, the chests contain a Mixed Gummy/Melange Gel and a Rune Bottle.
Go west and north from the weapon shop to find a chest (1,000 gold).
Go east of the northeast house, and go north to reach the trees there. There is a secret passage through the trees that leads to the ledge behind the house. Just wander around under the leaves until you find it. You'll see Cless/Cress start to sweat when he's in the passage. The chest on the ledge contains a Charm Bottle.
Now go into the northeast house and watch the cutscene.
You can buy a Kite Shield for Cless/Cress, but you will get one for free later. Stock up on supplies. You should buy 15 of all the kinds of food they offer in the food store here, but to fill your food sack you should only use Apples, since they only cost 1 gold and give you 60 units of food, being one of the most cost-effective foods in the game. Once the sack is full, make sure that you have 15 of each food.
Leave Euclid, and go east across the bridge. Go north past the house in the mountains and you will reach a town. Go into town and buy a Pick-axe and Rope from the item store. You might want to buy Holy Bottles and Dark Bottles as well. Then you can go to the weapon shop and armor shop in the east part of town and upgrade weapons and armor if you wish. You will get a Kite Shield and an Amber Cloak for free later, but you can buy them now if you prefer. The Warrior Sword is the most balanced weapon here.
Euclid, part 2
If you haven't already, go back to Euclid and buy plenty of food. You will need it for the next part.
Leave town and go south from Harmel to the house in the mountain pass. There is a chest behind the house that contains a Thief's Mantle. Go into the house and talk to Bart. He will give you the Opal Ring. Equip it on Klarth/Claus. You can rest for free in Bart's house.
When you are ready to move on, go north to enter the Long Valley.