Beelzeflies nest IMPLEMENTED

[Midonik]

A counterpart to reptilan drone silo. This building will spawn the beelzefly swarm unit with vanishing. When the swarm dies, it turns into a flood (it has vanishing too) and then it turns into the beelzefly flock on death, that then die normally.
I imagine that each unit of beelzeflies can have 3 turns of vanishing, and the ability to spawn them should probably have like 2 turns of cooldown for this to not be ridiculous - after all, the buildings won't count to the factory limit.
Naturally, the beelzeflies themselves can be easily one shooted (well, the main thing is that you need three attack to kill a swarm to the end as they spawn another unit on death) and don't have basically any attack, but thanks to those three actions needed to kill them, they can be a good blocker for sure.