Summon Swarm

Make a spell card:
NameSummon Swarm
SchoolConjuration (Summoning)
LevelArc 2, Brd 2, Drd 2, HB 2, Pestilence 2, Sor/Wiz 2, Spider 2
ComponentsV, S, M/DF
Casting Time1 round
Recharge TimeGeneral
RangeClose (25 ft. + 5 ft./2 levels)
EffectOne swarm of bats, rats, or spiders
DurationConcentration + 2 rounds
Saving ThrowNone
Spell ResistanceNo