Army Ant Swarm

This monster doesn't have a single mind (typically because it's a swarm of smaller creatures), and is immune to mental effects that target only a specific number of creatures. It is still subject to mental effects that affect all creatures in an area.

Trigger A creature leaves the swarm's space Effect The swarm takes 1d6 untyped damage as ants cling to the creature and continue biting, dealing 3d6 persistent piercing damage. High winds or immersion in water reduces the DC of the flat check to end this persistent damage to 5. Any area damage dealt to the creature destroys these clinging ants.

Each enemy in the swarm's space takes 3d6 piercing damage (DC 21 fortitude save). A creature that fails its save against Swarming Bites becomes Clumsy 1 for 1 round. If the creature attempts a concentrate or manipulate action while affected, it must succeed at a DC 5 flat or the action is lost; roll the check after spending the action, but before any effects are applied. Effect: Swarming Bites