I believe this is addressed in Rabbi J David Bleich's article in Tradition, "Liability for Harm Caused by Metaphysical Forces"
The Talmud in Bava Kama has plenty of cases where our courts can't punish someone, but Heaven will demand punishment (e.g. various cases of psychological damage); there's also talk about if you render your friend's wine or cow non-kosher: it still looks like perfectly-fine wine or or a perfectly-fine wine, but metaphysically it's no longer the same.
Presumably you're asking about the punishment for employing metaphysical means to physically damage someone. If I recall correctly, Rabbi Bleich says it depends how those metaphysical means work -- are you asking God to cause the damage (but He may say no), or is it no different than shooting someone with a physical gun, just with different mechanics (where if God allows things to follow their normal course, damage would occur). He cites both interpretations; in the former interpretation, one would certainly be exempt, at least from the justice our courts can render.