Beast Species: Womp Rat
The melee attack of a pack or swarm is an area attack that affects all squares with in reach. The ranged attacks of a pack or swarm are considered to have a 1-square splash. Area attacks deal an extra 2 dice of damage against a pack or swarm.
Creatures that have the “pack” or “swarm” species trait are actually a group of three or more individual creatures that move and fight as a single unit. They occupy the same space and are treated as a single creature for the purpose of combat, though they might be described as a cluster of several creatures. For example, a womp rat pack has a single statistics block and acts like a single creature, but might actually be three or four womp rats in the context of the encounter’s description. Typically, a pack or swarm has a CL2 higher than the base creature’s CL.
To create a pack or swarm, make the following changes to the statistics block of any beast:
Increase the creature’s size by one category, and apply all relevant modifiers.
Double the creature’s hit points.
Increase the creature’s damage threshold by 10.
All melee attacks are considered melee area attacks, affecting a squares within reach. An adjacent allied pack or swarm is not affected by a pack or swarm’s area melee attack.
All ranged attacks are considered to have a 1-square splash.
Area attacks deal an extra 2 dice of damage against a pack or swarm.