Are familiars`souls connected to the soul of the master in any way, or is the bond just a mental link?

I'm not entirely sure I understand, but I'll try my luck. Familiars and masters are not bound in a way that, should one die, so, too, would the other. The damage the master does sustain when a familiar dies is because of mental anguish (I think it also says that?), so yes, it's a mental link.

Thanks, Snoteye. I have a more specific question related to this one, but it`s character-specific so I`ll save it for a PM when I get back from vacation. I might not be able to get to a computer again until the 8th.