Darkened Blade

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise, the spell fails. On a hit, the target suffers the attack’s normal effects, the creature takes Necrotic damage equal to your spellcasting ability modifier, and shadows grabs the creature reducing its speed by 10 feet until the start of your next turn.

This spell’s damage increases when you reach higher levels. At 5th level, the melee attack deals an extra 1d6, necrotic damage to the target. If the target is in dim light or darkness, it instead takes1d8 necrotic damage. The spell’s damage increases further when you reach 11th level (2d6 or 2d8 +spellmod), and 17th level (3d6 or 3d8 +spell mod).