Tier 13 of the Dawning of an Endless Night Story Quest in The Secret World
For the 13th tier of the Dawning of an Endless Night quest, you need to go to the Mine, and when inside you need to head to the Deep Mine Shaft. You get down by taking the first right when you zone into the solo instance and ride the elevator down.
Wander around aimlessly in the dark killing shades. When you stumble upon a Miner’s Helmet, you know you’re heading in the right direction. Right click on it from your inventory to activate the light.
After going deeper into the cave, your helmet light will shut off. This is another indicator that you are going in the right direction. You will then stumble upon a flare gun. Use it to light your way and stun shades periodically. Eventually you will come across Gaia’s Seal, and a cute cuddly puppy that you will need to murder.
For Tier 14, you just Travel to the marker and watch more cut-scenes.
Dawning of an Endless Night Tier 15 Guide: Here