It seems a little odd to me that steam machine (an object) would be effected by resurrection but living things would not . . .
Neat idea though, and it seems to be one of the more workable "bring things back to life" cards.
the idea behind is, objects are not supposed to move and attack you,
these things have spirit inside so they can do so,
thus the spirit can easily back to life by hosting on another objects or in their original spirit forms
while living animals cannot resurrect because their bodies are destroyed