Dead Mans Hand

As part of casting this spell, the caster must take 1d4 of piercing damage in order to obtain the material component of the Spell, unless the caster is already suffering from a disease or curse, in which case the spell does not require the material component

You create a Large, pale greenish hand of necrotic energy, in an unoccupied space that you can see within range. The hand lasts for the spell's duration, and it moves at your command, mimicking the movements of your own hand.

The hand is an object that has AC 20 and hit points equal to your hit point maximum. If it drops to 0 hit points, the spell ends. It has a Strength of 22 (+6) and a Dexterity of 10 (+0). The hand doesn't fill its space.
When you cast the spell and as a bonus action on your subsequent turns, you can move the hand up to 60 feet and then cause one of the following effects with it.

Deaths Touch. The hand strikes one creature or object within 5 feet of it. Make a melee spell attack for the hand using your game statistics. On a hit, the target takes 3d8 Necrotic Damage

One Foot in the Grave. The hand attempts to burden a creature with the inevitability of death. Make a check with the hand's Strength contested by the Constitution check of the target. If the target is Undead, they have advantage on the saving throw. If you succeed, the target has disadvantage on attacks and saving throws until the end of your next turn.

Reaper of Souls. The hand attempts to absorb the life essence of any creature it touches. Make a melee spell attack for the hand using your game statistics. On a hit, the target takes 4D6 Necrotic Damage, the caster then receives half the amount of damage taken as temporary hit points.  

Death Grip. The hand attempts to grapple a Huge or smaller creature within 5 feet of it. You use the hand's Strength score to resolve the grapple. If the target is Medium or smaller, you have advantage on the check. While the hand is grappling the target, you can use a bonus action to have the hand crush it. When you do so, the target takes bludgeoning damage equal to 2d6 + your spell-casting ability modifier.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage from the deaths touch option increases by 2d8 and the damage from the reaper of souls and deaths grip increases by 2d6 for each slot level above 4th.