The process of inscribing runes was a bit tedious, especially so on the body of another individual.
On one's own body they could be inscribed with their own mana, by giving a sort of solid shape to their mana and engraving it onto their skin, or sometimes even other parts of their bodies, like the eyes.
However, engraving runes on the body of another was a tedious process, One had to acquire special materials to make into ink, or inscribe them through other means.
The most common of which, was using blood. The blood of the individual could be used to transcribe runes on their own body, however, it had some downsides.
"This was first developed by the orcs, I don't know how, the book just said an orc shaman was fooling around with the blood of his enemies and managed to make a rune."
"Why do we need a history lesson?"
"Because it helps me focus?"
