Say you have a ghost sorcerer or wizard. Since incorporeal creatures have no strength score, what happens if a ghost sorcerer cast Beast Shape? Does the spell simply fail?
Spells that boost stats which don't exist for the monster should work but provide no benefit to that stat. So the sorcerer could shift into a tiger, but it would still have no strength score.
Spells that boost stats which don't exist for the monster should work but provide no benefit to that stat. So the sorcerer could shift into a tiger, but it would still have no strength score.
If that's the case, then how much damage does the ghost-sorcerer-tiger do with a claw attack? Along the same lines as that, if an incorporeal creature attacks with a Ghost-Touch melee weapon, how much damage does it do?
Well, a ghost claw attack won't physically affect a target, so it should work the same as the ghost's corrupting touch attack but look like a claw swipe. You could even flavor it as if it was a claw strike, but it will mechanically work as the corrupting attack because at the heart of it... the ghost sorcerer is now a ghost tiger, not a real tiger.
The melee weapon is different and I never figured it out to my satisfaction. A strength of - isn't the same as 0, but I don't know how it should modify melee attacks. You could simplify things and make it use Dex to-hit and provide no bonus damage (since it isn't strong).