=He'd hold out his arm, and an array of billions of tiny runes would light up on it.= "This, by imprinting runes onto yourself. Often used for protection against certain things, but you'll need the experience to program that knowledge into the runes itself."

Description: Danger Teacher Teaches Runes. Location: Runes Vocational College "Aggressive Teaching" - https://youtu.be/CO5IN60Nt9E