Corruption Burst

You raise your hand and channel acidic energy, before thrusting it down into the ground. The energy bursts out violently, inflicting anybody in a 15 ft sphere around you must make a constitution saving through or be affected with a curse. On a success, they take 1d8 acid damage and suffer no further effects, but on a failed save, they are afflicted with the curse. This curse activates whenever any of their allies comes within a 5 ft range of the cursed victim. When this curse activates, both the victim and any of their allies within a 5 ft radius around them takes 2d8 acid damage each turn, so long as they remain in the radius. The effect does not activate that turn if there is nobody within the 5 ft radius of the victim. The curse lasts for 3 minutes, before ending for everybody afflicted.

At Higher Levels: This spell's curse deals 1d8 more damage for each spell slot used above 4th level.