Transformations on non-caster things can NOT be undone.
To clarify: If you transformed a rock into gold, could you then transform the goulder into rock?
Also, what are the restrictions on stuff? If you had a solid air sword with "Air" written on it, and you cut someone with it, could you transform them into air? How about arrows, or something?
Is is possible to have words engraved on an object with words? How about turning living stuff into (say) inanimate stone?
the torso (The upper part of the body, basically from the shoulders to the end of the rib cage)
Why not call that part the chest? Maybe the thorax, if you want to get sciency?
First, this differs somewhat from normal enchanting because it puts a great deal of strain on the caster. The magic does not want to be contained and controlled by them; it actively fights them. During the setting process, the caster who is having the magic imbued into them has to make an endurance check, with a difficulty equal to the Potency score of the magic being embuned into him. If he fails, the magic overtakes him and transforms his body into whatever the spell was that was being put into him, except greatly magnified. IE, if a caster failed while having the word "Fire" set into him, he would be consumed in an enormous burst of flame. (anyone caught in the effects of such a thing can use it as their reaction for that turn.)
Can you intentionally do something like that, and set it off later as a suicide-bomb thing?
How many of these rules apply to non-player creature transformations, like NPCs (Muggles< since you mentioned that they applied to basically all mages) or summoned critters?
And with the inclusion of rolls into the mix, like derm said, being made out of steel isn't good when in any point in the process, it could explode or turn you into a metal sculpture from an unlucky one or six, it would work in a faster medium, but even then you've still got the fact any screw ups of the cards could have you starting over again.
Then, maybe defying nature by being made of metal is not such a good strategy?
But I don't want to turn into shit.
I want to turn into pure metaphysical death and conquest.
Easy. Engrave a nail with "Death Conquest" and hammer it in.
It would be entirely possible to take your solid air sword, stab it into someone and then attempt to "set" the air word as a method of killing or injuring them. Though there should probably be a will contest in there to prevent that being too op. Same with arrows or anything else really.
Yeah, you could turn a rock to gold and then back to rock by inlaying "rock" with a rock. It just doesn't turn back if you remove the inlay.
Not sure what you're asking with the first part there, but turning living things into stone is fine. Though I may have to add an "inanimate" modifier for that.
Because I was writing for the sake of remembering and planning. And because people in the earlier game thought chest was just the chest, not the back too.
I suppose you could suicide bomb like that, sure. Just have to refuse to roll.
It only applies to Players and NPC casters. As I said in the normal enchanting section, engraving words into anything except a caster all works the same way. So you can turn your wolf into a hell hound, it just can't control the fire you enchant it with.
Again, these are all just ideas. I want to make the system more balanced and interesting, rather then just shouting semi-comprehensible word salad at each other. Why? Because having a nice, balanced, more in depth system doesn't preclude me from adding a section about "Classic perplexicon" with the old rules and shit for those who just want to hurl magnetic poetry at each other. I'm building a more complex system but that doesn't mean that the old ways are impossible to use any more.