QUOTE (Kev @ Jan 21 2009, 06:41 PM)
To be honest, I'd be on the fence about allowing that spell into a game. I completely understand your logic on it, but I never really liked mana sub-targetting parts of people (it's like creating a "Head Explode" spell; it targets the individual as a whole but only effects his head? Doesn't seem to gel in my head).
For your other issue, the -2 modifier you're talking about is noted for the jumbling and confusing nature of trying to do something physical while looking via the astral. For spellcasting, you have to be able to see the target of the spell on the same plane as you hope to effect them. Seeing a mundane's aura does nothing to help spellcasting in complete darkness because you can't see them whatsoever in the meat. You'll know WHERE they are (and as a GM, I might provide some sort of bonus for that), but in order to form the link to harm them/affect them with your magic, you need to have LOS on their physical body. The better the view, the easier it is to complete the link to them and thus the better your ability to affect them (as noted - partial cover impedes spellcasting attempts for DC spells).
I agree that targeting part of something doesn't seem to be possible with direct combat spells. The book describes the spell as doing damage to the target from inside. I'd probably be fine with such a spell targeting things that can be removed from the whole without destroying the item. For example, I'd allow someone to target the tire of a car, but not someone's hand. This is a pretty flexible rule on my part and if the gaming group I was with needed a "bright-line" rule I'd probably be inclined to stick to whole objects.
With that said I'd really like a quote from the book that says "Cyberware paid for with essence is part of the creature who paid the essence for it." Don't get me wrong, I believe this to be true, and at least implied within the rules. But I can't find where it is actually stated. I'd be happy with this meaning that the cyberware is now no longer a distinct object from the living target for the purposes of a direct combat spell. This flows better with the existing rules better than the alternatives where you need to figure out how much structure the cyberware has and decide exactly what the effect of breaking specific pieces of cyberware has on the living target.
As for Line of Sight with astral perception, the book does not require you to be able to see the target on the same place as you want to effect them. You just need to be on the same plane.
QUOTE
A magician in the physical world can only cast spells on targets that are in the physical world. Similarly, a magician in astral space can only cast spells on targets that have an astral form (though the auras of things in the physical world can be seen, auras alone cannot be targeted). An astrally perceiving (or otherwise dual natured) magician can cast spells on a target in either the physical world or in astral space.
Note that you can't attack an aura, but you can attack the person whom the aura belongs to. Also, under the astral perception its not clear how an aura is "perceived" but I'd say that the cyberware that is part of a person do not actually show up as simple holes in their aura. I'd suggest that an aura is more than just a metahuman glowing construct in the astral world in the same place that this person happens to be standing. Perhaps it is that, but it is also something more. Those with the knowledge of how aura's change with body modifications can recognize the tell-tale signs within the aura of another living being (hence a test to recognize 'ware). But those less trained in Assensing would have difficulties in noticing even a cyberarm (especially if of a higher than average grade.) So no, I do not believe you get Line of Sight on items within the living being that you happen to be looking at with astral sight.