Arcane Armor

You create a magical aura that affects you and all allies you choose within 10ft. This aura increases Toughness of all affected creatures by 1. The armor flashes around them as it takes damage from attacks and can be styled in any way you like. For each additional Stamina spent, increase your Toughness by an additional 1. You can only have one instance of this spell active at a time. If you cast this spell again, it overwrites the previous casting. When casting this spell, the maximum amount of Stamina you can spend is equal to double your normal max Stamina value. If you spend more than your normal max Stamina when casting this spell, gain 1 Stress.