Once you've obtained the Orb of Friendship and freed the Enchanted Beach from the Nighttime Thorns of Disney's Dreamlight Valley, Merlin the Wizard will give you a new quest called "With Great Powers." The Goal is to meet Ursula in the mysterious cave which is in the northeast area of the enchanted beach. This well-known character from The Little Mermaid will offer you a deal. She will give you the crystal key provided you help her out of the cave.
For this, you will have to seize the orb of power to lift the curse that hangs over the enchanted beach of Dreamlight Valley. Accept the proposal to obtain the crystal key which you will have to place in a device which is located near the locked entrance to a cave on the enchanted beach. This famous device is located just behind the pillar which should normally accommodate the orb of power. Once the mechanism is activated with the crystal key, you will be able to enter a cave where you will have to solve several puzzles!
Exploration of the mystical cave, how to solve the first riddle:
Once in the cave, you will have to find a way to remove the first magic door that blocks your way into the mystical cave. You will see three statues hold out their hands and a stele will tell you the riddle to be solved.
Bring the precious stone whose shape falls so that you can continue your heroic quest.
Exit the cave and use your pickaxe to mine the mineral deposits found along the rock walls of Dreamlight Valley. You will have to collect three types of minerals, a garnet (red), an aquamarine (blue), a Peridot (green). When you have them, all you have to do is place them in the hands of the three statues in the mystical cave for the path to open.
Exploration of the mystical cave, how to pass the second riddle:
Once you have passed the first part of the mysterious cave, the quest "with great powers..." will continue and you will have to find a way to remove the second magic barrier that blocks your way. Here is the riddle to solve...
Discover above the good cultures to continue your adventure. One is under the ground, the other gold and brown. What remains is red and round.
You will need a bag with Carrot Seeds (obtained at Goofy's Stand) in the Quiet Meadow, you will also need Wheat Seeds which you can buy from the same stand. Finally, the last one you need is the bag of seeds to plant tomatoes that can be obtained at the Goofy stand on the enchanted beach.
When you have the three, go back inside the mysterious cave and plant in order (from left to right), the carrot seeds, the wheat seeds and the tomato seeds under the three statues. You will then need to water your plants. The tomatoes you will have to water them twice, in the middle of the process they will indeed run out of water. When the three plantations have reached maturity, the second portal opens!
Exploration of the mystical cave, how to pass the third riddle:
You are almost at the end of the quest... Here is the third riddle to decipher.
The ultimate riddle whose answer you will have to find: cook and eat what you have grown.
Quite simply, you must use the stove in the cave and put in ingredients a carrot, wheat and a tomato to prepare the vegetarian pasta dish. Consume your meal immediately from your inventory and the third magic portal will dissipate before your eyes.
Complete the "With Great Powers..." quest and claim the Orb of Power:
You have one last thing to do in the mysterious cave. You just need to take out your fishing rod and fish in the small body of water to bring up the orb of power. Once you have it in your hands, all you have to do is place it on the pillar waiting on the enchanted beach in order to free it from the nocturnal thorns and free Ursula from her prison.