You summon a chittering wave of bubonic vermin that swarm over a surface in a 30-foot long, 15-foot wide, and 10-foot tall line in a direction of your choice. Each creature caught in the wave must make a Dexterity saving throw. On a failed save, a creature takes 25d4 piercing damage, is knocked prone, and is moved to the end of the line. On a successful save, it takes half as much damage and suffers no other effects.   Objects that are not being worn or carried in the line take 25d4 piercing damage.   After the initial effects, 2d4+2 swarms of rats appear in the spaces at the end of the spell’s range. The swarms of rats roll their own initiative and follow your commands (no action required by you). If given no commands, they will attack the creature nearest them that took damage from the initial wave.   The rat swarms add your spellcasting ability modifier to their attack and damage rolls, deal magical piercing damage, and add your level to their hit point maximum.   Finally, when you cast a spell with a range of touch, a swarm of rats created by this spell can deliver that spell as if it had cast it. The swarm must be within 100 feet of you, and it must use its reaction to deliver the spell when you cast it. If the spell requires an attack roll, you use your attack modifier for the roll.   When reduced to 0 hit points or when the spell ends, a swarm of rats disappears.   The GM has the swarm of rats’ statistics