QUOTE (Neraph @ Jan 19 2009, 10:16 AM)

It doesn't come from the rules. The Channeling metamagic works eactly like posession, except a couple things. So you need to look at how posession works, and ratify that with the Channeling rules. You actually use all of the spirit's special attributes (edge, magic), mental attributes (lower when resisting damage [drain included]), and add their force onto your physical stats. Since you have Channeling, you get to use the skills of either the spirit or yourself, whichever you decide to.
EDIT: They might have gotten the "use own attributes" from an extrapolation (incorrectly so) from the drain clause.
I was basing my argument that the Channeling magician uses his own Mental attributes when using his own skills on my own idea of what is 'common sense'. Sometimes a dangerous practice, I know.
There actually isn't a drain clause. The closest the text comes is page 55 of
Street Magic, "... the vessel resists any mana spells or powers with the lowest Mental Attribute of the two minds (whichever is lower, the spirit's or the magician's). Spell and power resistance are not drain resistance. Otherwise the Mental Attributes of the spirit are used, as per normal possession rules, (p. 55, p. 101) By that default, Drain is resisted with the spirit's Mental attributes, no matter how they compare to the magician's.
This is a bit of a conundrum. It would appear from the arguments in the thread above and the actual text in the core books that a magician who Channels a spirit would resist drain from a Conjuring test using the spirit's Mental attributes, not his own. This despite the fact that spirits can't Conjure.
So, Uncle Zola with his Magic 8 should summon and be possessed by a F16 spirit before he tries to rebind and Invoke that F8 spirit. His CHA and WIL would be 16 each, adding to 32, plus Centering, Focus and Mentor bonuses! This makes Uncle Zola even scarier than he was.
Even crazier, Channel a spirit to use its Mental stats to bind itself, the very spirit possessing you!
EDIT: Whoa! It gets crazier still. The Special attributes are those of the spirit (p. 102). So the magician would cast spells with the Magic rating of the spirit. And have Edge equal to that of the spirit. Even if the GM, using the rule that you can't force a spirit to use Edge, says the magician can only spend his own Edge points, they still act AS IF he had the Edge of the spirit. Think for a moment back to that F16 spirit, giving a Magic rating of 16 to the magician, and allowing Uncle Zola to spend his 4 Edge points with the 'oomph' of 16 dice!
I don't know, but my 'common sense' assumption is looking better. Is there an official judgment we could get on this?
EDIT ( 2 ): The Dumpshock possession FAQ, point #2, says the Channeling mage's Special attributes override the spirit's special attributes. Which directly contradicts p. 55, p. 102 of SM. Hmm.
Peter