A hive mind is a collective consciousness. Thought to be shared amongst insect based species, in many ways it gives a great advantage. What one knows, they all know. It can give resistance to mental attacks and improve reactions and more. With a hive mind you are truly never alone.
The downside is that if you manage to crack into the hive mind, an attack on one is an attack on all. A mental virus can be devastating to a hive mind.
Presented here are some Hive Mind Feats that can apply both monsters and players.