1 item: While your Stamina is less than 50%, increase your Magicka Recovery by 450. While your Magicka is less than 50%, increase your Stamina Recovery by 450.

You need 5 items to be able to create the Mythic item. Location of the 5 pieces:
• Alik’r Desert – Torc Strand of Lore – Korignah Boss Forsaken Hearth’s Cave
• Bangkorai – Torc Strand of Song – Captain Blackheart in Blackheart Haven Dungeon
• Deshaan – Torc Strand of Power – Druitularg’s Ritual Altar World Boss
• Craglorn – Torc Throat Guards – Anka’Ra Crucible World Boss Event
• Stonefalls – Torc Tonal Focus – Wrathvenom boss in Crow’s Wood