Black Hole

You create a large hole in the space-time continuum. The black hole immediately grows to a radius of 15 feet from the place you specify. It you would be in it's space, you may choose to float float as if by the Levitate spell. 

The black hole increases in radius by 3d10 feet and sucks all huge or smaller creatures in this area inside every round. Since this magic is dark and unpredictable, roll a d20 for every creature sucked in to find the effect. 

1. The creature is magically transported to the Ethereal Plane. 
2. The creature is magically transported to the Astral Plane. 
3. The creature is magically transported to a random Elemental Plane. 
4. The creature is magically transported to the Elemental Chaos. 
5. The creature is magically transported to any plane (of the DM's choice). 
6. The creature is magically transported beyond the known multiverse. Every round here they take 10d10 psychic damage. 
7. The creature is blasted into the air a number of feet equal to the black hole's radius.
8. The creature is trapped as if by the imprisonment spell. 
9. The creature is permanently Blinded. Roll on this table again. 
10.  The creature is permanently Deafened. Roll on this table again. 
11. The creature is permanently Paralyzed. Roll on this table again. 
12. The creature permanently gains the ability to cast Thaumaturgy, Hellish Rebuke, and Darkness at their lowest level. Their alignment changes to Chaotic Evil. 
13. The creature is frozen in time and cannot take actions for 1d4 + 1 rounds. 
14. The creature is spit out of the black hole and casts time stop. This lasts for 1d4 + 1 + their Charisma modifier and they can attack during this time. 
15. The creature gains immunity to all damage for one minute. After this time they gain resistance to all damage. 
16. The creature is caught between the forces of good and evil. It takes 20d10 necrotic damage plus 20d10 radiant damage. Their alignment changes to Neutral. 
17. The creature loses all it's memories and is under the effects of the feeble mind spell. 
18. The creature gains the ability to teleport up to 100 feet and make one attack as a bonus action. At the end of this time they take 1d10 force damage for every 100 feet away they were from the place they started. 
19. The creature sees a horrible visage and loses the ability to deal damage. 
20. The caster may choose the effect or roll twice, ignoring any 20's

A creature can take control of this black hole by casting Wish or Charm Monster at 9th level.