The Disney Dreamlight Valley "With Great Power…" quest is given by Merlin early in the game, and it includes multiple objectives including some tricky riddles. You will be tasked to go through a set of trials to prove you are worthy to help save Dazzle Beach from The Forgotten, and restore its Orb. Here's how to complete the With Great Power questline from start to finish.

Disney Dreamlight Valley "With Great Power..." wallkthrough

First, you will need to have the Dazzle Beach biome unlocked. The Dazzle Beach biome requires 5000 Dreamlight to unlock, and you will find this biome on the southeast of the map. Once the biome is unlocked, head to the northeast side of Dazzle Beach, and go inside the cave emanating shadowy mist from its entrance.

After heading inside the cave, you will find Ursula, the Sea Witch, all alone. Speaking with Ursula, she will tell you she is trapped in this cave and is in need of your help. Ursula will give you a Crystal Key to open the locked entrance to another different cave on Dazzle Beach. You will need to take and place the Crystal Key given to you by Ursula on the small pillar. The small pillar is found northwest of the Dazzle Beach fast-travel Well.