Ur-histachii

 Ur-histachii  were undead forms of histachii.

Description
Ur-histachii look like an undead counterpart of a living histachii. They share the same physical characteristics with some minor differences. They are often covered in unhealed open wounds, in which mold grew and maggots lived. They had a distinct odor, a mixture of acid, decay, dust and rust.

Combat
Ur-histachii mindlessly attacked any non-reptilian within range, using their fangs and claws in a charging attack.

Abilities
Despite being undead, ur-histachii retained the same senses of when they were alive, including infravision with a range. Some ur-histachii were bestowed the ability to enter into a berserk state up to three times a day. Ur-histachii had an immunity to charm, cold, hold, and sleep-based spells. They also were immune to poison and death magic. They were vulnerable to blessed or holy water.

Society
Ur-histachii were created (possibly exclusively) by the Cult of the Dragon cell and their yuan-ti allies in the catacombs beneath Hlondeth. Their main use was to guard vital stockpiles and standing guard outside important meetings. Since they were undead and did not require oxygen, they were also used to guard important chambers that were sealed. They were not allowed near the brood chambers because of their instability, and they tended to chew on carrion and small vermin when idle.

The Cult also used them as assassins, by teleporting them to a location inside an enemies fortress or home. Once there, they entered into a berserk state and wreaked havoc.