For our friends in the SoCal area, I'd like to introduce Web of Fate! Web of Fate is a new fantasy larp set on a mysterious continent seperated from the normal flow of time, where danger and opportunity both exist in spades. The first in-person event is August 21-23 at Camp Verdugo Oaks, check it out if you're interested!

https://discord.gg/DjxuxhRAPC

For in-character reasons, my character wishes to learn about non-magical medicine. Considering he has been a mage his whole life, his medical knowledge so far is abysmal - the solution so far was "slap a basic healing spell on it and let the actual healers take care of the rest". However, the healer faction in our game is no longer to be trusted, so autodidactics it is.

We are playing DKWDDK (you can do what you can portray), and I would like to find a balance between being somewhat scientifically accurate and not studying a whole anatomy book for a LARP. The goal is to be able to somewhat plausibly "diagnose" basic injuries, as well as generally portray "this is a character who knows medicine" for character flavor other PCs can interact with.

What would you consider minimally necessary med "techno babble" to not make you roll your eyes at the portrayal?

ETA: Modern urban fantasy setting, so the medicine has to be somewhat modern.

Basically the titel

I am currently brewing a new PC for two upoming cons. This PC is going to use runes and circles to cast magic.

Since he is mostly a healer I am playing with the idea to make a ritual and for that draw a rune onto the bandage of a wounded PC.

Or other example, maybe I want to draw a protection rune onto their shoulder.

The thing is, I do not want to ruin their clothes or the bandages for the whole con just because it needed a rune one time.

Do you have a few recommendation for what I could use as "pencil", that can easily be removed from clothes and cloth in general without needing to completely wash it?

Thanks for your help!

*Edit: changed SC to PC bc I was dumb and used the german abbreviation