Help, need to sanity check an NPC only feat that a PC has taken interest in. Quckly.

[Evil DM Mark3]

I could see it being used for convincing people that you turned someone immortal.
I could also see that being used to try to make you look like a much lower level caster.

This is fine, the con man con maning is fine. I was more worried about unseen break-the-rules-and-get-lots-of-power situations.