You unleash a virulent disease on a creature that you can see within range.

The target makes a

The damage can't reduce the target's HP below 1. If the target fails the saving throw, its hit point maximum is reduced for 1 hour by an amount equal to the damage it took. Any effect that removes a disease allows a creature's hit point maximum to return to normal before that time passes. Whatever the case, after an hour passes, the creature makes another Constitution saving throw. On a failed save, they become

Diseased

At Higher Levels: Increase the damage by 2d6 for each spell level increase.