Fell Bats circle above every Gravelord host, monstrous carrion-feeders loosed against whatever the legions cannot yet reach. They stoop out of the dark to shred bowmen, foul war machines, and carry off sentries mid-cry, then scatter beyond reprisal before any alarm is fully raised.
The dynasties prize them as much for their senses as their savagery. A vampire lord can look out through the flock and see the battlefield spread beneath a hundred pairs of wings, making the bats the aristocracy's unblinking watch. In Soulblight lands, folk bar their shutters when the bats fly thick at dusk — not for fear of the beasts, but of whoever is watching through them.