Hex

Curse a creature that you can see within range.
Until the spell ends, deal an extra 1d6 necrotic
damage to the target on attack. Choose one
ability when you cast the spell. Target has
disadvantage on ability checks made with the
chosen ability. If target drops to 0 hit points
before this spell ends, you can use a bonus action
on a subsequent turn to curse a new creature.
Remove Curse on the target ends this spell early.
• concentration 8 hrs at 3rd/4th level
• concentration 24