concentration, 5 minutes/mana
As two actions, swarming, biting locusts fill a sphere centered on a point within 20 meters. The locusts spread around corners and remain for the duration. The sphere’s area is lightly obscured and difficult terrain.
A creature that enters the spell’s area for the first time on a turn or starts its turn there must make a Fortitude saving throw.
On a failure, it takes 2d6 piercing damage.
On a critical failure, it takes twice as much damage.
On a success, it takes half as much damage.
On a critical success, it takes no damage.
At the start of each of your turns if the locusts are within 20 meters of you, you can cause them to move up to 2 meters in a direction that you choose. If you spend an action, you can move them up to 10 meters.
You can increase the damage by 1d6 for every other additional mana expended.