Bat Bomb

A creature can throw this clay bat-like container at a point up to 60 feet away as an action. When the container makes contact with the ground, a swarm of firey bats is summoned and will attack the closest creature within a 30-foot radius and will continue to attack any creature within their 30-foot range until they are defeated or until the effect of the item ends. If no creature is within 30 feet of the bats, they will stay within the 5-foot radius of where they were summoned and attack the first creature that comes within 30 feet of them. After one minute, the bat swarm will dissipate into wisping smoke.

To throw the container, the creature must make a ranged attack as if with an improvised weapon. The fire bat swarm will use the same stat block as a swarm of bats, but deal fire damage instead of piercing damage. The fire bat swarm takes the initiative directly after the creature that threw the Bat Bomb.