Bewitch

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 of the options below when you cast the spell.

1 The target has disadvantage on ability checks made with the chosen  ability STR DEX CON INT WIS CHA 

2 choose one damage type the creature now is venerable to that damage type 

3 when you choose this effect it has a casting time of 1 reaction

Use this effect when a creature makes a attack roll a save or a abillity check they must then make a wisdom save on a failure the attack roll save or ability check counts as a natural 1 

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

a cast of the remove curse spell on the target ends this spell early.