Viola's Blood Curse: Blood Wither

You can begin to corrupt the very blood of your enemies perverting the very laws of nature. You can force a creature that you can see within range to make a Constitution saving throw. On a failed saving, that creature cannot regain hit points for the duration of the spell.

Until the spell ends, you can deal an additional 1d12 necrotic damage to the target whenever you hit it with an attack.

Spells and magical effects such as Lesser or Greater Restoration have no effect on a creature for the duration of this spell.

A Remove Curse cast on the target ends this spell early.