The character calls forth a mass of 1,000 venomous, biting and stinging spiders, scorpions, beetles, and centipedes. This carpetlike mass swarms in a square 20 feet on a side. Upon the character's command, the swarm creeps forth at 10 feet per round toward any prey within 100 feet, moving in the direction the character commands. Each vermin in the creeping doom effect automatically bites a creature for 1 point of damage and then dies. Each creature takes enough damage to kill it, destroying that number of vermin in the process. These attacks are nonmagical attacks, so creatures with damage reduction are safe.
If there aren't enough vermin to kill all the creatures in the spell's effect, damage is distributed among the survivors equally.
If creeping doom travels more than 100 feet away from the character, it loses 50 of its number for each additional 10 feet it travels. Anything that would deter or destroy normal insects is effective against these insects.