In Disney Dreamlight Valley, each character has their own line of quests. Many of them will include talking to other characters, cooking, or collecting items from the valley. In the same way, you will need to complete Ariel's final quest with the help of other Disney characters. Here is how you can complete Ariel's Level 10 quest in Disney Dreamlight Valley (Ancient Doorway).
How to complete Ariel's Ancient Doorway quest in Disney Dreamlight Valley
The Ancient Doorway is the final quest for Ariel and it becomes available once you have reached level 10 friendship with her. Ariel will find a Stone Slab and will ask you to investigate it. With the Stone Slab, go to Merlin, and talk to him about it. He will tell you that you need to fuse four different emotions of the villagers into the slab for it to work. Now return back to Ariel and she will infuse joy into the slab. Ariel will also tell you to find Remy for the next emotion, passion.
Go to Remy, give him the slab, and talk about his passion for cooking. This will add the emotion into the Stone Slab. He will tell you to find Moana for the next emotion, excitement. Once again, you will give the Stone Slab to Moana who will provide with excitement to fill the Stone Slab. Finally, you will need to visit Ursula for the last bit, anger. The Stone Slab is infused with all the four emotions and all that is left is to place the Stone Slab inside the Mystical Cave.
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Where to put the Stone Slab in Disney Dreamlight Valley
Now that the Stone Slab is ready, you will need to place it inside the Mystical Cave on Dazzle Beach. Head inside the Mystical Cave, go to the bottom level where you will find glowing neon-blue colored chunks of stone. Check the image above to identify the cave and the glowing rock formations. Take a right from there, you will see a wall with an inscription of the Stone Slab.
Interact with it, use the Stone Slab, and it will reveal the Mystical crystal. Pick it up and go back to Ariel's house. Give her the crystal and that will conclude the Level 10 quest for Ariel. As your reward, you will get Ariel’s seafoam gown and Seafoam suit.
To find out more on Disney Dreamlight Valley check out, How to complete Olaf Presents… ”Dreamlight Valley” in Disney Dreamlight Valley on Pro Game Guides.