Doom Desire

You place a curse on a creature that you can see within range. On each of your turns until the spell ends, starting this turn, you add one special die called a doom die to a pool of dice. When the spell ends, the target must make a Wisdom saving throw. On a fail, the target takes an amount of force damage equal to the pool of doom dice, or half as much on a successful save.

At higher levels
The doom die changes when you cast this spell at higher levels. The die becomes a d6 at 2nd level, a d8 at 3rd level, a d10 at 4th level, and a d12 at 5th level.