After you make your way through the Beach Cave at Suthorn Beach, you reach Suthorn Village.
Explore Suthorn Village
Go into the southwest house of the village and approach the fireplace, then press ZR to learn the Meat echo. You can use meat to lure certain monsters.
Go into the house east of the southwest house to learn the Pot echo.
North of that house, you can learn the Trampoline echo.
Near the trampoline, you can jump into the well to find a chest that contains 5 jars of floral nectar.
There is an item shop in the northeast part of town. There you can buy a Piece of Heart for 80 rupees. You can also buy Red Potion for 30 rupees, and Floral Nectar for 30 rupees.
You can also talk to the shopkeeper if you would like to sell things.
When you're ready to move on, go east and you'll be back in Suthorn Prairie.
Suthorn Prairie
Near the east exit of the village, you see a shimmering sign. Press ZR to learn the Sign echo.
If you try to go north from there, you find a rift blocking the way.
Go back south to the sign, and go farther east, and Tri asks you to check something out. Check on the glowing item and it will add a waypoint to your map. You can now use the map to warp to this location.
Go southeast to reach Suthorn Forest. There will be a cutscene.
Suthorn Forest
Go east and defeat the Zols. Then go north to where there is some water. Swim across, defeat the Zols, then open the chest to get 5 electro apples. Swim south across the water.
From there, go east until you see a small ledge to the north. Jump up it, then create a table near the wall, and a wooden box near the table. Jump onto the wooden box to reach the ledge above. Then go north and open the treasure chest to get 20 rupees. Go back the way you came.
First Cave in Suthorn Forest
Go east and enter the cave. Defeat the Zols and spin in the grass and bushes for a chance to get some rupees. Make your way through the cave, and you'll find a monster on fire. Throw rocks at it three times to defeat it, then go up to the shimmering monster and press ZR to learn the Ignizol echo. If you look at the Ignizol entry in your notebook, you see that it has two triangles above it. You can only have three triangles active at a time, and the Ignizol uses two triangles, so keep that in mind.
Go north through the door. There are many Zols hidden in the grass, but you can create an Ignizol and target a Zol. The Ignizol will cause the grass and bushes to burn, and the Zols in the grass will be defeated by the flames (or by your Ignizol if you target the Zols by holding ZL).
After the Zols are gone, pick up your Ignizol (you won't get burned), and go north to where there is an unlit torch. Put your Ignizol on the ground, then target the unlit torch, and your Ignizol will jump at the torch and light it. This opens the north door. Go through. Open the chest to get a Fairy Bottle.
Now you can either go back through the cave, or you can press - to go to the map, and select the Waypoint that you added to the map earlier, and warp to it.
Go east from the cave, and the sign will warn you to watch out for monsters hidden in the grass. There are some Ropes (snakes) hidden in the grass, but if you went into the cave and learned the Ignizol echo, you can create an Ignizol and throw it into the grass to burn it, defeating the hidden enemies easily. Afterward, go up to the shimmering monster and press ZR to learn the Rope echo echo. Ropes will rush straight at enemies, but they will be stopped by obstacles, but you can pick them up and throw them as needed.
Go north to find another cave entrance. Go inside.
Second Cave in Suthorn Forest
You can see a Piece of Heart to your right. To get it, go all the way down the ladder, then go down the second ladder. A monster will see you and roll toward you, but it won't be able to hit you because it will fall into a lower area. Create Sea Urchin echoes for the rolling monster to roll into. Keep doing this until the rolling monster is defeated. Go up to the shimmering monster and press ZR to learn the Caromadillo echo.
Go to the right to find a bunch of wooden boxes. Create a Caromadillo echo, and it will automatically roll through the boxes to destroy them. Go to the right, and climb up the rock wall. There is a Caromadillo up above, but after it rolls down, you can ignore it and just keep climbing the walls to reach the Piece of Heart on the left.
Go to the left to climb up the ladder and exit the cave.
Go to the Destination
Now it's time to go to the destination marked on the map. Go west, and you will see a Moblin. You can target the Moblin with ZL and create a Caromadillo echo to bump into it. Hit it three times to defeat it. It might drop a Monster Fang. Then walk up to the floating monster and press ZR to learn the Spear Moblin echo.
Go west and swim in the water until you are underneath the floating fairy. You will automatically catch it in your Fairy Bottle. It will revive you if you lose all your hearts.
Go west from there to find a sign. Go northwest from there and you will see the house that Impa told you to go to, but you find that it's mostly covered by a rift. Approach the house and there will be a cutscene.
Tri tells you to go northeast from the sign, so go southeast to the sign, then go northeast up the wooden steps.
Keep going east and you'll reach an area guarded by three Spear Moblins. There is a treasure chest on a wooden tower, but it's locked. You have to defeat the three Spear Moblins to unlock it. You can create meat to distract the Moblins, then create a Spear Moblin of your own to fight them.
After they're defeated, look for the pile of leaves slightly southwest of the wooden tower. You can put a trampoline there and jump on it to land on top of the trees. Walk on the trees to reach the treasure chest, and open it to get 10 bunches of refreshing grapes.
Go east and check on the item to create another waypoint on your map.
Go north from there, and there will be a cutscene.
When you're ready, go north and press A to enter the golden spot that Tri created. You'll reach the Stilled Suthorn Forest.