Soul Ward/Body Ward + Metaphysical Spellshaper

[Yogibear41]

Can I combine one or both of these spells with this prestige class for fun times? Is there anything specifically keeping me from doing this in the rules?

[icefractal]

I assume those prevent ability damage? I can't remember if that PrC has a "ineligible if immune" clause like Hellfire Warlock. If not, then you're good to go. Although good luck finding a GM that's on board with that PrC at all.

[Necroticplague]

Yes, nope. Of course, that seems a bit ineffecient. Seems like it would be a bit simpler to just dip Ghost or Necropolitician, then take damage to your DEX (which you're immune to).