The Wilder-shaped swarm waited patiently as the cat wandered off. While it fidged there, its body constantly shifting and reforming (as if for practice, or simply out of boredom) it attempted again to alter its shade.
This time, it managed--so that when Wilder returned, it was proudly sitting upright cloaked in midnight black. It now looked almost precisely like Wilder herself.
For a moment, the cat made up of bugs simply eyed the mouse. Then it rose, padding on its paws delicately--as Wilder walked, but with a strange, unfamiliar jerkiness to it. They hadn't quite figured out how to do that smoothly, yet.
The black cat bent down, as if to sniff at the mouse--and then opened its jaws, leaning further. Instead of biting it, however, the swarm's "face" seemed to simply break free in a cloud, its smoky substance engulfing the mouse and shrouding it from view. As the hive fed, there were tiny clicking noises, and Legion did little else.
After a moment it drew back, the cat face reforming and peering to Wilder. Nothing was left of the mouse but fresh bones.
"...Thank you," they buzzed. "This--sustenance--will keep us well for--some time."
For a moment further it simply sat there, black cat watching black cat, before tilting its head to one side. It was wondering how, exactly, Wilder worked. If she was not a hive, a swarm, then--what was she? It looked to the mouse bones, and then to her, again. "Are you--like the 'mouse?' Flesh. Bone?" the hive asked, curiousity evident in its buzzing tone. It sounded polite enough; it probably did not intend to eat her.