Del's Dissecting DIsk

You create a swirling magical disk of force 4 feet in diameter in an unoccupied space you can see within range. It hovers in place and can move in any direction. The disk can carry up to 200 pounds of weight and once during your turn you can command the disk to move up to 100 feet. The disk can move through solid objects and creatures, even a wall of force, which the disk instantly dispels when it moves through its space. When the disk moves through the space of a creature, you can have the disk make a melee spell attack that deals 12d10 force damage on a hit. If the attack scores a critical hit on a target, that creature's body is instantly bisected at a point that changes based upon that target's size.

Tiny- Small: head

Medium- Large: upper torso or waist

Huge- Gargantuan: 1 limb or tail

If the target has none of these, that target is not bisected, but takes 1 point of exhaustion.