DND Note Card: Hex

You place a curse on a creature that you can see
within range. Until the spell ends, you deal an
extra 1d6 necrotic damage to the target
whenever you hit it with an attack. Also, choose
one ability when you cast the spell. The target has disadvantage on ability checks made with the
chosen ability. If the target drops to 0 hit points
before this spell ends, you can use a bonus action
on a subsequent turn of yours to curse a new
creature.