Initially from a role-playing perspective could be seen as odd - however, it depends on your view of what "magic" is like Gnomy says. SO you can speak to the "dead" but heal using Holy Light [or whatever its called] just two sides of the same coin perhaps?

Any template purely based upon owanage with no thoughts to the character sucks - but in this case I know Gnomy well enough that this would surely fit Demos totally

Go for it Gnome!