The Thulecite Medallion is an Ancient item. It requires 2 Nightmare Fuel, 2 Thulecite, and a Broken Ancient Pseudoscience Station to craft. Like all items from the Ancient Tab, the Thulecite Medallion cannot be prototyped and Characters need to be near a Broken Ancient Pseudoscience Station to craft it again.
- Calm Phase - The medallion will be tan.
- Warning Phase - The medallion will be tan with red accents.
- Nightmare Phase - The medallion will glow red. Nightmare Lights will spawn Shadow Creatures in this phase.
Examining the item at this time will provide further details regarding the current state of magical flux: becoming more magical, staying steady, or becoming less magical, referring to the start, middle, and end of the Nightmare Phase, respectively.
When outside the Ruins (including in the Caves), it will remain a constant red, with the character noting it's not working when it's examined.
When a Thulecite Medallion is in the inventory of a player, the Ancient Key will appear on their map, even if it is carried by another Mob or player, in a container or on the ground and in an unexplored area.
- Using a Thulecite Medallion in Don’t Starve Together is an excellent way to find the Ancient Guardian (if it has not been found/killed yet), as it holds the Ancient Key. It is also a good way to locate the key when the player carrying it has travelled off somewhere too far and can't be found.