Court of Stars is a dungeon whose entrance is located in Suramar in the World of Warcraft game. The minimum level for this dungeon is 110. The dungeon contains 3 bosses. The end boss of Court of Stars is Advisor Melandrus.
This dungeon is the first dungeon in the game that can only be completed on Mythic level. In addition to it being Mythic level only, you also need to complete 'Friends with Benefit' questline, complete 'Nightfallen But Not Forgotten' achievement and 'The Waning Crescent' and 'Blood and Wine' parts of the 'Good Sumaritan' achievement. Also you need to be Honored with the Nightfallen faction.