Action Type: Bonus Action
Target: 1 Creature
Range: 8 Tiles
Components: V, S, M – 1 Blue Gem
Duration: Instantaneous
Classes: Warlock

Description:
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 a disadvantage on ability checks made with the chosen ability.