[quote=@Frengo]
<Snipped quote by Framing A Moose>

Uhhh, I mean you can if you want, but going into the realm of death from the nightmare realm would kinda be like Inception. 

What would one do in the realm of death, anyway? Gimme a quick example. 
[/quote]

Well, without the Abhorsen bells, she can't do much. Mostly just bring recently departed human souls back into their bodies, if the body isn't too damaged.