Dark Demonic Wolf was a close cousin of the Demonic Bloody Moon Wolf.
Demonic Blood Moon Wolves hunted in packs and intimidated their prey with fear-inducing bloody fog, while Dark Demonic Wolves were solo hunters. They would not let their prey notice anything until the moment they tore apart their throats and dug out their hearts.
All of their limbs and organs were designed for them to hunt in the dark.
Their bodies had the streamlined design of bullets and blades. Their limbs contained thick pads, and they could seal their pores at any moment to not release any sort of presence. In fact, even their throats and nostrils had evolved to the point where they could remain silent even when they breathed rapidly.
Of course, since the Dark Demonic Wolves had to maximize their ability to remain hidden, they had to sacrifice some of their offensive ability.