Vashirak’s Embrace

You open a gateway to a realm of shadow, a region infinite darkness, twisted creatures and unspeakable horrors. A 30-foot-radius sphere of blackness and death appears, centered on a point with range and lasting for the duration. This void is filled with a cacophony of malevolent whispers and screams that can be heard up to 30 feet away. No light, magical or otherwise, can illuminate the area, and creatures fully within the area are blinded.

The void creates a warp in the fabric of space, and the area is difficult terrain. Any creature that starts its turn in the area takes 4d6 necrotic damage. Any creature that ends its turn in the area must succeed on a Dexterity saving throw or take 2d6 force damage and be restrained as writhing tendrils of shadow constrict it. The creature can repeat this save at the end of its turn.