How to Complete Realm of Uncertainty — Crimson Desert

Follow these steps to complete the Realm of Uncertainty:

Move forward until you reach a gap with a raising platform.
To cross the gap, sprint by quickly tapping / and then press / to jump. Do not hold to sprint, as this prevents jumping.
Head to the next platform. Approach the edge, press and hold / to aim, move the cursor to the pillar, and press / to jump to it. Repeat this process to jump across subsequent platforms to reach the other side.
After the platforms, climb the wall ahead by approaching it, pressing / to jump at the wall, and using the left stick to climb quickly before stamina depletes.
Head left at the top of the wall and crouch through the hole with or roll with /.
Proceed down the path of platforms until the last one, where you will learn Blinding Flash – Concentrate Light.
On the bottom platform, press + > while holding, then press again to start concentrating light. Aim at the symbol until the door below opens.
Enter the door and jump across the platforms in the water by waiting for them to line up and sprint-jumping.
Enter the dark entrance ahead. Use your lantern with / to light the path.
Follow the path forward to the exit door. Continue to the diamond-shaped platform ahead to trigger a cutscene, which concludes the mission.

Tips

When jumping between platforms using the aim function, pressing and holding / allows for accurate jumps.
Climbing walls consumes stamina, so do it quickly.
Crouch through the hole with or roll with /.
Use the lantern with / in dark areas.

Realm of Uncertainty Walkthrough