Spiked Inverted Aura Earrings. Jotunheim: The Earrings. This is the last installment of the Jotunheim chain maille jewelry set. "Spiked Inverted Aura" using Bright Aluminum and Enameled Copper in Black and Gray and Snowflake Obsidian. These coordinate with the spiked necklace and bracelet that I have previously posted.