“How do they keep escaping us!” thundered Baron Gallond. “I know the guards are loyal, I choose them myself. How?”
“The last one’s were stripped naked yet some how they still manged to get out, my lord.”
“The King wants them alive, so we will just have to figure it out. Get me that wizard, he seemed to have ideas.”
Revolutionary’s Tattoo
These magical tattoos are used by revolutionary cells (and occasionally by criminal organizations) as both means of identification and as an ace in the hole if the person is captured. The tattooing process is painful and puts great stress on the recipient so only true believers and the most dedicated.
Sea of Stars RPG Design Journal 