1 item: While you are in combat, you are immune to Snares and Immobilizations that can be cleansed, but you cannot Sprint.
You need 5 items to be able to create the Mythic item. Location of the 5 pieces:
• Eastmarch – Snowy Sabre Cat Fur Strip – Direfrost Keep (Drodda of Icereach)
• The Rift – Petrified Snow-Cedar – Giant Camp World Boss
• Bleackrock Isle – Auri-El Metal Carvings – Random Monsters, Frostedge Sentry, Mudcrab
• Coldharbour – Magicka-Imbued Metal Plates – Cyrodiil, Underpall Cave, Boss Raelynne Ashham
• Western Skyrim – Glacial Metal Rivets – Blackmaw Boss in Labyrinthian