Edmund's Choking Shadows

A writhing shadow is cast within a 20ft cube centered on a point you can see within range. The shadows of those within this area are turned against their owners, throttling their throats with shadowy hands. For the duration of the spell this shadow turns the ground in the area into difficult terrain.

When a creature enters the affected area for the first time on a turn or starts its turn there, the creature must make on a Strength saving throw or be restrained by their own shadow. A restrained creature is also silenced for as long as they are restrained. A creature that starts its turn in the area and is already restrained by their shadow takes 1d8 force damage.

A creature restrained by their shadow can use its action to make a Strength or Dexterity check (its choice) against your spell save DC. On a success, it frees itself.

At Higher Levels: When you cast this spell using a spell slot of 4th level or higher, creatures restrained by this spell take an additional 1d8 force damage for each slot level above 3rd.