[(E)]

Witch wasps, Wizard wasps, Witch weirds
Large brightly coloured wasps that move in hypnotic patterns. Any one with a thaumaturgy or ritual magic skill will find the movement familiar.

The wasps movement is a three dimensional magic ritual. The power is expressed through the drones.(there may be several)

Small scale magic from stealthy casters or a swarm with defences these critters could be played with in a number of ways.

Small scale magic
Substitute inches for feet or yards.
Shrink and be tricky, wither limb becomes wither digit. (Poor scout)

Twists
Make the swarm rats or moths.