Okay, i got to point this out.
Furi has red eyes, as does Mors/Nailbat, with nailbat it explains his "reaper's eyes" and insofar as now, they've gone without explanation for Furi.
Now, I hypothosise this:
Dee mentioned that he had slipped up earlier and let somebody ELSE (not Mors) take a look at his list, I propose that this somebody else is Furi.
And thats why he can bypass Nailbat's "immortality" he can chjange times on the list which are not his own, therefore, Mors/Nailbat is fair game, and treated just like any other mortal.
Also, I'm betting Furi is pretty much immortal as well, with the exception of a vs. Nailbat confrontation. Obivously, its someone who got Nailbat's powers and went the other direction with it.
Or maybe not, maybe it has something to do with Malaphas. Why is Furi so afraid of HIM?
Hes got to have something up his sleeve other than charisma if hes ruling a psuedo-immortal like Furi through fear.
The red lifeline may be indicitive of it being tied with another "reaper"'s, in this case Mors/Nailbat's
Could this be how Nailbat is able to alter his own lifeline, by altering the connected one in Furi?
You may now, and probabbly will, ignore my rambling.
*tip o' da hat*
"Justice is the Art of the Thief"
"Weapons and armor are for those who lack skill, Honor and courage"
~Drunken Monk to a Paladin in the tavern. No bystanders were harmed in the ensuing brawl~