The Mark of the Wanderer now graces your brow. It is an ancient rune of protection, first used upon Cain as a divine punishment by God himself. This protection is truly impenetrable by anything short of an omnipotent being. Anyone attempting to, or succeeding at doing you harm will find their efforts returned upon them sevenfold. This reflected harm is conceptual in nature. A normal human might find their punch throwing them across the room with a broken arm. But a Demon Lord dealing a grievous blow will find themselves swiftly turned into a pillar of salt. Having been marked to wander eternally by God, you are immune to the ravages of time, and are completely incapable of doing yourself intentional harm.