Tam's Singularity

You momentarily open up a portal to the negative energy plane at a point of your choice within range that you can see. Each living creature within 10 feet of the point must make a Constitution saving throw, taking 5d6 necrotic damage on a failed save, or half as much damage on a successful one. If this damage reduces a creature to 0 hit points, or a creature that is targeted is already unconscious or asleep, that creature must make a Wisdom saving throw. On a failed save, they are sucked through the portal into the negative energy plane. A creature that is transported is instantly destroyed if they are not a fiend or celestial, have over 200 hit points, or have the capacity to cast at least one spell of 8th level or above. Nothing short of a true resurrection or wish can restore the creature to life.