This will take you down to an underground passage where you can attempt a combat trial. When you first arrive at Fort Joy, examine the hatch on the ground near Griff. However, there is a way to remove them, though you’ll need to be a little eagle-eyed. This prevents you from using any Source powers or magic, essentially putting you at a slight disadvantage when you’re in combat. When you first start out in Divinity: Original Sin 2, your character, along with all potential party members, will have a Source collar strapped to your neck. Removing All Source Collars in Divinity: Original Sin 2