Critter Swarm

A swarm of hive critters — rats, roaches, spiders or similar — burst from vents and grates, creating a
crawling and biting carpet beneath the fighter's feet.
In the End phase of each round, each player rolls
a D6 for each of their fighters. On the roll of a 1,
these fighters are attacked by Critter Swarms and
must make a Strength check. If they fail, they
become Prone. If the fighter was Prone already
and they fail the Strength check, they must make
a save roll or suffer