You conjure a magical swarm of flying insects that fill a 5 foot cube within range. For the duration of the spell, the swarm is magically replenished and cannot be destroyed. As a bonus action, you can direct the swarm to move up to 30 feet. If the swarm enters another creature's space, it stops and swarms them, stinging repeatedly, and cannot be moved until the start of your next turn. The creature takes 2d4 piercing damage and must make a Constitution saving throw, taking 6d4 poison damage on failure.