From: wsb1@dolphin.upenn.edu (Bill Brickman)
Date: Wed, 5 Apr 1995 17:56:59 -0400 (EDT)
BTW, the vis extraction rules I believe we're using are these:
(QUOTE FROM MAILING LIST FAQ):
Section 5: Specific Questions
"What is vis extraction?"
Vis extraction is a lab activity that was removed from the rules in writing ArM3. It is thought that this was to balance out the addition of the "Vis Blender" spell. Having both would effectively allow magi to cook up Vim Vis in the lab and convert it into any Art-related vis they desired. It is suggested that you allow either one or the other of these options but not both.
The general rule is that one season of lab activity dedicated to this activity will yield a quantity of Vim vis that is equal to: ((Cr + Vi + Magic Theory + (3 * Aura)) / 5). No other lab activity can be undertaken in conjunction with this activity.
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Now, I know we said Int+Cr+Vi+(3*Aura) divided by five last night, but I think the original formula works best-- it basically guarantees at least one point no matter where you do it, due to the fact that every mage has a Magic Theory of 5.
so, I propose the following rule: To extract Vim vis, total Cr + Vi + MT + (3*Aura). For each five full points, you extract one pawn of Vim vis. (These were the 2nd edition rules). On top of this, of course, Mike has added that there is a maximum of N pawns per year that can be condensed out of the magical air of a place. Thus in a +0 Aura, you can't extract anything, and in our +5 aura, all of us together could extract every season of a year and only come up with 5 pawns between us-- and I assume we can't push it, without Devious GM Repercussions, like the aura dropping.
Bill