Cloud of Debilitation

You fill the air with a dusty translucent cloud in a cube 20 feet on each side, centered on a point you choose within range. Each humanoid inside the area must succeed on a Constitution saving throw or be affected by this spell for the duration. Each humanoid must succeed on a Constitution saving throw or be affected by this spell for the duration when it starts its turn there.

An affected humanoid takes a −2 penalty to AC and Dexterity saving throws.

If the affected humanoid starts its turn within the cloud, they take another -2 penalty to AC, to a minimum of 11 AC.

A creature affected by this spell makes another Constitution saving throw at the end of each of its turns. On a successful save, the effect ends for it.