Burn Magic Into Your Flesh
Searing runes and arcane geometry into one's skin is an agonizing practice known as spellbranding. Though it was once used by tyrannical giants to imbue their conscripts with a mote of magical potential, spellbranding has long since been disparaged in polite society. However, a few that are willing and desperate enough to burn themselves with magical runes might still utilize that magic today. The so-called "Mage Brands" need none of a mage's intellect or a priest's faith; they need only tenacity and a tolerance for pain.
[see Spellbranding]
[see Arcane Synesthesia]