Progression in Interdimensional Travel (51)

And worst of all—they never made a sound. No growls, no shrieks, no heavy footsteps. The only warning of a Skulker's presence was the sudden glint of a blade-like limb, a flash of motion in the corner of your vision—and then the sharp, searing pain of a wound you never saw coming.

The Howlers were terror given form, their presence heralded not by the flapping of wings or the rustling of movement, but by the bone-rattling wail that shattered the air before them. They were skyborne predators, lurking in the planet's twilight skies like living specters, their forms blending with the dim light until it was too late.