[@Timemaster] Looks neat! I will say the runes seem like an interesting side of the arcane. Their use will be at a cost, however. I will talk to my co-gm as to what the costs will be. The forcefield will be just a single moment, rather then seconds of activation. Healing will cut time off the user's lifespan by the amount of time saved by healing. (Just an idea)

Light will perhaps cost some stamina.

Shield looks alright. The arm will be as heavy as the material it turns into and cannot be undone until the time limit. Essentially it would be like stone. No dexterous movement with it.

The detect friend rune I'm hesitant on. I don't want to nerf it too harshly, but I don't like it really either as it is kinda like easy mode for villains. I'll talk to my Co gm.

I think I can allow the last rune on the condition that magic the begins outside of the 2 meters (fireballs, etc) does not dissipate. It simply disallows magic to begin within the circle or any type of arcane abilities. Magic that begins from outside the circle continues on.

I will mention these things to my co gm. I like the ideas you are going for and look forward to tweaking things with you. Magic in this world comes with great cost. You can read up on it above in the hider. It's not as easy to use as other high fantasy games.