Iron Flesh

Casting Iron Flesh causes the skin of the mage temporarily to become as hard as iron, making it next to impossible to wound him or her in battle. Thus it is a very strong defensive spell, actually the strongest available to a mage using Runic Magic, which should be used when entering hostile territory.

In Ultima Underworld II the Avatar needed to cast this spell after bathing in Filanium mud enriched in Basilisk Oil and baking it on the skin with lava, to become a perfect vessel for an Air Djinn after breaking the Djinn Bottle.

Trivia

 * Alternatively to casting the spell, a potion can be bought from Merzan.