Apophis' Maw

You summon a Singularity in an empty space within 50 feet that you can see. The Singularity grows to a size of 10 feet in diameter, and sucks anything within a 25 foot sphere into itself. At the start of their turn, creatures must succeed on a Strength saving throw or be sucked 15 feet towards the singularity. Any movement away from the singularity within the area of effect counts as difficult terrain, and any movement towards the singularity doubles the creature's movement speed. Any creature that ends their turn within the singularity is transported to the 619th layer of the Abyss, known as the Eternal Banquet. 

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the Singularity's Area of Effect increases by 5 feet per level.