Where to find the other half of the hourglass
This guide shows how to complete the Find the other half of the hourglass objective in the Casualty of War: The Hourglass Favour/ Side Quest in God of War Ragnarok.
Note: To complete the quest, you must first complete Return of the River favor, which will flood the crater with water.
Go to the dock near the gateway as shown in the picture below and hop on the boat. Row the boat back to the area where you destroyed the pillars the dragon was sitting on (Marked as 1st top on the map below). Open the gate on the north side of the area by pulling the chain near it as shown in the second picture below. Then continue ahead and dock the boat on the beach as shown in the third picture below to reach the Dragon’s Lair.
Go straight ahead and open the gate. Use your spear to destroy the rocks on the right side of the hallway as shown in the picture below.
Proceed ahead in the tunnels and destroy the rocks on the right side of the hallway where the dragon is breathing fire at you. This will break the wall, which will stop the dragon to stop breathing fire in the hallway. Now you can safely pick up the second half of the hourglass from the front of the fallen bounders as shown in the second picture below.