Transfer Life

You target two creatures when you cast this spell. One loses life and the other gains life. The creature from which you take life makes a Constitution saving throw. On a failed save, the creature takes necrotic damage equal to 1d8 + your spellcasting ability modifier, or half as much damage on a successful save. A creature may fail the saving throw if they choose. The target that you selected to gain life regains a number of hit points equal to the damage dealt to the first creature. At your option, you may also grant additional hit points to the creature if you would gain them from another source (such as the warlock's dark one's blessing or the life domain cleric's blessed healer abilities). Any gained hit points that exceed the second target's hit point maximum are not taken from the first target. 

Instead of transferring life with this spell, you may transfer one disease or the poisoned condition from one creature to the other. A creature that does not want to be under the effects of the disease or poison must succeed a Constitution saving throw or receive it anyway. 

At Higher Levels. When casting this spell using a spell slot of 2nd level or higher, you deal an additional 1d8 damage for each slot level above 1st