EX Treasure: Twilight Relic

"EX Treasure: Twilight Relic" is a Side Quest in.

Overview
The Quest is obtained after purchasing The Master Trials DLC pack and upon reaching Hyrule Kingdom. The Quest will activate upon loading the overworld of Hyrule, which can be done by Traveling, reloading a save file, dying, or leaving an Ancient Shrine. When the Quest is activated, Link will be tasked with finding Misko's EX Journal, which is rumored to be in the Outpost Ruins. In the Journal are clues to the locations of eight Treasure Chests, each containing a priceless relic stolen from Hyrule Castle by Misko. The Journal states the helmet of the Princess of Twilight can be found in the ruins of of a temple flooded by the Regencia River. It is possible to activate the second stage of the Quest by reading Misko's EX Journal without triggering any of the loading conditions for the Quest's activation. The Treasure Chest can be found buried next to some rubble south of the ruins of the northwestern building in the Sage Temple Ruins. Using the Magnesis Rune, Link can pull the Treasure Chest out of the ground and open it once it is free to obtain Midna's Helmet, completing the Quest.