PHB
Bane
1-level Enchantment
Casting Time: 1 action
Range/Area: 30 feet
Components: V, S, M
Materials: a drop of blood
Duration: Concentration, 1 minute
Up to three creatures of your choice that you can see within range must make Charisma saving throws. Whenever a target that fails this saving throw makes an attack roll or a saving throw before the spell ends, the target must roll a d4 and subtract the number rolled from the attack roll or saving throw.
At higher levels: When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level above 1st.