Zerg Blightling

Edit: The new Viper ability 'Parasitic Bomb: Latch onto an air unit, dealing 90 damage over 7 seconds to that unit and any air units around it. Effect persists for the remaining duration if the target is destroyed.' is oddly similar to my idea.. Coincidence?

I wanted to try to make a moth influenced Zerg unit, but not too moth-like. Keep in mind these unit concepts are more for my portfolio, so don't take them too seriously. I guess you could say it's a combination of the Scourge and the Spawn Broodling ability from the SC1 Queen. The Blightling is very small and fast, once it attaches to an enemy air unit, it creates a cloud around the unit. This cloud affects near by enemy units if it is touched. Once infected by the cloud, the unit releases a cloud of its own and can be passed through an entire air army very quickly, in this manner. If the enemy doesn't kill the infected units, these units eventually die and spawn another Blightling.