QUOTE (HappyDaze @ Aug 9 2009, 09:14 PM)

I'd just allow the hits to bring you up to your natural scores before racial adjustments. This means that a human with Body 3 changing into a troll would get Body 5 with 1 hit, Body 6 with 2 hits, and Body 7 with 3+ hits. If his Strength was 2, it would be a 5 with 1 hit and 6 with 2+ hits. The same character with Agility 3 would have Agility 1 with 2 hits or less and Agility 2 with 3+ hits.
I considered that. At first the spell read,
QUOTE (Wombat @ Aug 9 2009, 02:26 PM)

Consult the Metatype Attribute Table, p. 81 SR4A, for the subject’s Base Physical attributes while in metahuman form. Add 1 to the subject's Base Physical attribute Ratings for every hit the caster generates, up to the caster's natural attributes in their native form or the metatype's Augmented Maximums, whichever is lower.
Because the point of the spell is the shape, not the stats, it really doesn't matter if the Elf in Troll form has a less than troll-like strength, or that the Troll in Elf form has less than Elf-like charisma(read as physical beauty).
How about this though...
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Metahuman Form (Physical)
Type: P • Range: LOS • Duration: S • DV: (F ÷ 2) +3
(Metatype) Form (Physical)
Type: P • Range: LOS • Duration: S • DV: (F ÷ 2) + 2
Metahuman Form transforms the subject into one of the standard metatypes that comprise metahumanity, though the subject retains its own consciousness. This form is the same gender as the caster and generally shares other traits as well�"eyes of the same color, similar skin tone for the character’s ethnicity/metatype, distinctive scars and injuries, tattoos, piercings, etc...
Consult the Table below, and remove the subject's racial bonuses, and replace them with that of the desired metatype. The Force of the spell must equal or exceed the highest value modifier of the attributes being affected. Thus, Dwarf or Elf form must be cast at a minimum Force of 2, Ork form at Force 3, and Troll at Force 4. The subject's Mental attributes remain unchanged. This spell does not transform clothing and equipment.
Metatype B A R S INI
Dwarf +1 - -1 +2 -1
Elf - +1 - - -
Ork +3 - - +2 -
Troll +4 -1 - +4 -
Metatype form works like the Metahuman Form spell, but only allows the subject to change into a specific metatype. Each Metatype form is a different spell (Dwarf Form, Human Form, and so on).
The Force of the spell must equal or exceed the highest value of the attributes being affected. Her Mental attributes remain unchanged. This spell does not transform clothing and equipment.
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I've also removed the restricted target so that you can turn those nasty Humanis Policlub goons chasing you down the street into a bunch of dwarves. Which also gives an optional incentive to up the force and reasons you might care for more than one success, counterspelling still being in the picture as well.