Although they seldom attack game larger that a house cat, they have
been know to attack humaoids and other larger prey if they get very
hungry. Although they are not intellegent, they have a hive mind that
coordinates their attacks into a simple strategy. That is:
Isolate the prey and drive it into an area where the whole hive can
attack from ambush.A
spider swarm seeks to surround and attack any living prey it
encounters. A swarm deals 1d6 points of damage to any creature whose
space it occupies at the end of its move.
Distraction (Ex): Any living creature that begins its turn with a spider swarm in its space must succeed on a DC 11 Fortitude save or be nauseated for 1 round. The save DC is Constitution-based.
Poison (Ex): Injury, Fortitude DC 11, initial and secondary damage 1d3 Str. The save DC is Constitution-based.
Skills: A spider swarm has a +4 racial bonus on Hide and Spot checks and a +8 racial bonus on Climb checks. It uses its Dexterity modifier instead of its Strength modifier for Climb checks. It can always choose to take 10 on a Climb check, even if rushed or threatened.