User blog comment:123bante123/Can it reap them ?/@comment-1509826-20120115184937/@comment-3481504-20120115185251

Yes, but Death wouldn't even need the weapon, he could kill them with his bare hands. They actually are immortal in a sense, but can killed by eating themselves/others. Also, Death never loaned his weapon to them, it was given to them by Crowley.