There are several mysteries and legends for you to uncover in Pokémon Sword and Shield’s Crown Tundra expansion. These mysterious are chock-full of fun little puzzles for you to learn about, and if you learn how to unravel them, you’ll receive a legendary Pokémon for your trouble. For those looking to seek out Regice, you can find the entrance to its temple.
You can find Regice’s temple in the Snowslide Slope area. Rather than make your way towards the top of the mountain and follow the path, stick to the left side and follow the path alongside the slope. Continue walking until you reach the end, and the entrance to the temple is locked off. When you approach and interact with it, the temple requires you to “walk together with a living crystal of snow” to open that door.
All you have to do is find a Cryogonal and make it the first Pokémon you party, so it’s walking around with you. You can find them wandering around near the outskirts of the temple, not too far away, so if you haven’t caught one before, it shouldn’t be too difficult for you to catch it. Make it the first Pokémon at your party, and the door to the temples will open.
Once inside the temple, there will be various dots on the floor. Walk over these doors and make them all light up, and then you approach the statue at the back of the room to attempt to capture Regice.