Hex

Components: Verbal, Somatic, Material (petrified eye of a newt)
Range: 90ft
Placing a curse on one creature, for 1hr (concentration) you deal an extra 1d6 necrotic
damage, and choose one ability (strength, dex,
etc.) the creature has disadvantage on ability
checks using that ability. If the target hits 0hp,
you can use a bonus action on your next turn to
curse a new creature.