Monstrous Monday: Keres, Daughters of the Night

Thought I was done with Classical Mythology but I was rereading my notes and found this.  Shifting gears so I can post these horrors closer to their cousins.

Keres
No. Enc.: 1 (1d6)
Alignment: Chaotic Evil
Movement: 60’ (20’)
Fly: 240’ (80’)
Armor Class: 4 [16]
Hit Dice: 8d8+16 (52 hp)
Attacks: 3
Damage: 2 claw (1d6+4) + 1 bite (1d6)
Special: Flight, +1 or better weapons to hit, immune to death magic
Save: F8
Morale: 12
Hoard Class: Nil
XP: 2,340

Keres are the daughters of Nox, the personification of Night and are the Sisters of Death.  They are spirits that inhabit battlefields to carry off the newly dead to Tartarus.  They can be attacked, but only with magic items.  Any magic that affects demons also affects Keres.
Keres will attack mortals if they attempt to stop their business of carrying off souls. They are very fond of human blood.

A description of the Keres can be found in the Shield of Heracles (248-57):

The black Dooms gnashing their white teeth, grim-eyed, fierce, bloody, terrifying fought over the men who were dying for they were all longing to drink dark blood. As soon as they caught a man who had fallen or one newly wounded, one of them clasped her great claws around him and his soul went down to Hades, to chilly Tartarus. And when they had satisfied their hearts with human blood, they would throw that one behind them and rush back again into the battle and the tumult.

There is a possible relationship between these demons, the demoness Vanth, and the Erinyes. All appear to be similar creatures; female demon-like monsters with dark feathered wings.  Some scholars even point to their relationship among the Greek/Roman Gods for their similarity.