User blog comment:Skeith9/Heroic Spirits Speculation/@comment-24754018-20140730213737/@comment-24754018-20140731075953

Oh, I apologise if my phrasing was unclear, my writing tends towards the vague melodrama.

Yeah, it's sort of meant to digest people and turn them into magical energy, but things with bodies made of magical energy can be absorbed directly. Though a servant could probably resist and last longer if they have a good prana supply saved up. Likewise, humans would probably take longer to digest, but have no resistance at all. So it technically kills servants faster than people but doesn't in practice.

I just figured that servants probably have a higher resistance to spiritual bodies than modern people, so deciding whether to make them more or less resistant was a bit of a toss up between being made of the stuff it directly consumes and having existed in a time where people were often confronted with the supernatural.

But yeah, I should have been more clear.