I think that penetration is the key. I haven't thought this fully out and I am thinking about the situation as I type. I also hope that more people join this thread, as the subject seems integral to understanding how penetration, magic resistance, etc., works. I cast a spell that turns a rock red and then someone casts a spell that turns the rock to dust. Two different properties of the rock are effected. That I believe is a key element. You produce red dust. I turn a rock red and then someone tries to turn it blue (sounds like a certamen duel). If the penetration of the blue spell is lower that that of the red spell the spell fails. It does not go into a "waiting state". The spell either effects the material or it doesn't. In this case of lower penetration, the rock does not turn blue, it stays red. Similarly, if the penetration of the blue spell is higher than the penetration of the red spell, the rock turns blue. The magic of the red spell is overcome by the magic of the blue spell. If the penetrations are the same, the blue spell FAILS. The rock remains red. The spell either succeeeds or fails. Here are some issues. 1) What if the red spell is level 10 and the blue spell is level 50? Is is still penetration that counts? Wind of Mundane Silence dispels on spell level + stress die total being equal to or greater than double the previously cast spell. Certainly a level 50 Wind... spell would dispel the 10th level (except on a botch). 2) What if the spell I cast effects multiple properties of the rock, e.g. turns it blue and to dust? I would believe that both need to succeed for the spell to succeed, although with spontaneous magic, you could argue for a partial effect. 3) I am also afraid of Mini-maxers casting low level spells on themselves (no thread hijack here to warping points), and arguing that other spells have to beat the penetration of that spell to effect them. Thoughts, curses and prohibitions welcom.
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