|Mentioned||"The Hour of Death"|
The Endezeichen Grimm (Germ. endezeichen "end sign")  were the worst of the worst, a sect of merciless, intolerant Grimms devoid of any compassion whatsoever. It is said that they would roam the countryside mercilessly killing men, women, children and pets. It did not matter to Endezeichen Grimms if a Wesen was good or evil: in the eyes of Endezeichen Grimms all Wesen are inhuman abominations to be eradicated. Endezeichen Grimms were known to be inhumanely brutal, torturing captive Wesen and cutting fingers, toes, arms, legs, even genitals as grisly trophies. Their brutal tactics and indiscriminate killing of Wesen set Endezeichen Grimms apart from regular Grimms, who usually only kill evil Wesen, and even then resort to the quickest and cleanest method. To this day Wesen parents make sure to tell their children about Endezeichen Grimms via Albtraume fur Wesen Kinder, the Wesen equivalent of fairy tales.
The Sterbestunde G (Germ. sterbestunde "hour of death") was their symbol, which was stylized to look like a human skull. Endezeichen Grimms branded it into every Wesen they killed and drew it with the blood of their victims on every house of every village that had Wesen in it.
Aside from their brutal tactics and the Sterbestund G Endezeichen Grimms had additional trademarks. Endezeichen Grimms wore black hooded cloaks that went down to tops of their feet; concealing their entire body. In addition to their cloaks Endezeichen Grimms wore full face masks that had a vague skull-like appearance. The Endezeichen Grimms likely wore these garments to conceal their true identity from humans, Wesen, and regular Grimms. This would make it much harder for anyone to bring the Endezeichen Grimms to justice thus allowing them to kill Wesen with near impunity.
The Endezeichen Grimms are generally thought to have died out by most Wesen, but their memory is still powerful. As a result of the Endezeichen Grimms, most Wesen fear all Grimms and will do everything they can to flee from them, due to the fact that for centuries, they had no way of knowing whether or not the Grimm is an Endezeichen Grimm.
It is possible Endezeichen Grimms are still around, but are simply extremely rare. This could explain how Ryan Smulson got the Endezeichen Grimm branding iron, cloak, and mask which he subsequently used to copy them. Alternatively, their equipment could simply have been preserved, while they as an order are extinct.
Endezeichen Grimms have similarities to the Reapers. Like Endezeichen Grimms, Reapers wear long dark clothing and draw their trademark symbol with the blood of their victims. These similarities between the two groups may or may not be coincidental. It is possible that the Reapers were originally created in order to hunt down Endezeichen Grimms, using the Grimms own tactics, to keep other Wesen safe.