Is infinity a good number? By using a way of the open hand monk, and utilizing this feature

Quivering Palm PHB, pg. 80
When you hit with an unarmed strike, you can spend 3 ki points to start harmless vibrations in the target, which last for 17 days. As an action you can end the vibrations and the creature must make a CON saving throw. If it fails, it is reduced to 0 HP. If it succeeds, it takes 10d10 necrotic damage.

There are a lot of ifs, but If the creature does not have legendary resistance and if you hit with an unarmed strike, and if they fail the saving throw, then you can deal as much damage as that creature has health. (Someone correct me if I've gone wrong somewhere)

Quote from Nikoli_Goodfellow_King_Of_Random >>

Is infinity a good number? By using a way of the open hand monk, and utilizing this feature

Quivering Palm PHB, pg. 80
When you hit with an unarmed strike, you can spend 3 ki points to start harmless vibrations in the target, which last for 17 days. As an action you can end the vibrations and the creature must make a CON saving throw. If it fails, it is reduced to 0 HP. If it succeeds, it takes 10d10 necrotic damage.

There are a lot of ifs, but If the creature does not have legendary resistance and if you hit with an unarmed strike, and if they fail the saving throw, then you can deal as much damage as that creature has health. (Someone correct me if I've gone wrong somewhere)

 Well, technically, any monster with legendary resistance can ignore this, and if it's undead, take no damage from it. Also, most powerful monsters have high enough CON saves to succeed on this even on a nat 1. Case in point, the Ancient Red Dragon, with a +16 Con save. Also, any monster with regeneration can survive this.

Quote from Thauraeln_The_Bold >>

Quote from Nikoli_Goodfellow_King_Of_Random >>

Is infinity a good number? By using a way of the open hand monk, and utilizing this feature

Quivering Palm PHB, pg. 80
When you hit with an unarmed strike, you can spend 3 ki points to start harmless vibrations in the target, which last for 17 days. As an action you can end the vibrations and the creature must make a CON saving throw. If it fails, it is reduced to 0 HP. If it succeeds, it takes 10d10 necrotic damage.

There are a lot of ifs, but If the creature does not have legendary resistance and if you hit with an unarmed strike, and if they fail the saving throw, then you can deal as much damage as that creature has health. (Someone correct me if I've gone wrong somewhere)

 Well, technically, any monster with legendary resistance can ignore this, and if it's undead, take no damage from it. Also, most powerful monsters have high enough CON saves to succeed on this even on a nat 1. Case in point, the Ancient Red Dragon, with a +16 Con save. Also, any monster with regeneration can survive this.

 Okay

If you use reverse gravity in the right sized area with a ceiling to fall on, the creature can potentially take the fall damage twice. Once when initially hitting the ceiling, and once again when hitting the floor.

Quote from Bobbybaker >>

If you use reverse gravity in the right sized area with a ceiling to fall on, the creature can potentially take the fall damage twice. Once when initially hitting the ceiling, and once again when hitting the floor.

 Smart. Wait for them to hit the ceiling before dropping concentration. A good 35 more damage average, 60 more total.

Instantly kill (almost) any creature at level 7
Divination Wizard 2 (Rolling a 20)/Grave Cleric 2/Fighter 2/Blood Hunter 1
You grave cleric channel divinity then action surge then use blood curse of exposure if they resist nectrotic damage. Finally attack with the magic item Wave and it will deal double damage due to grave cleric vunerability and crit with divination wizard.

How do you cast both Prismatic Wall AND Reverse Gravity in the same round? These are both Leveled Spells. 

Quote from 23mcfly55 >>

How do you cast both Prismatic Wall AND Reverse Gravity in the same round? These are both Leveled Spells. 

 Last Line of OP