Opinions on homebrew spell?

Bell of death

Casting time: one action

Range: 60 ft

Duration: instantaneous

Concentration: no

Components: S,M(A bronze encrusted skull Of a humanoid made into a bell)

When you cast this spell each creature That can hear you within the range must make a wisdom save, on a fail the creature takes 1d6 necrotic damage, For the next minute if the creature fails this save against your spell again takes an extra 1d6 necrotic damage, the minute resets, and upon another failure they will take an additional 1D6, this minute keeps resetting

You can only add our charisma damage to targets of this spell once a round

For every too levels above 0 this spell is cast the casting causes an additional save to be made, and one additional save from level 1

(Assuming home brew that turns spells into cantrips and vice versa)