This mystery can be found on a tiny island at the northernmost point of Asgard, northeast of Heimdall’s Tower, AC Valhalla.
Where to Find Njord and How to Reach Him
To reach the small island quickly, you’ll need to take a boat from the shore, at the location shown in the map below. When you reach the island you’ll find the god Njord lamenting his current predicament. Read the note beside him for some context, then speak with him to begin a dialogue. After the conversation, you’ll need to take command of the boat you arrived in, and wait for Njord to join you on the boat. Once he’s sat down at the front, you can row him back to the mainland to complete the mystery.