Dark Net

You brandish the net used in the spell’s casting and make an attack with it against one creature. The first time it is hit by an attack each round, it takes extra necrotic damage equal to your spellcasting modifier as shadowy tentacles sprout from the net and leech the life away from its body.

At Higher Levels. At 5th level, the necrotic damage increases to 1d6 + your spellcasting modifier. The damage roll increases by 1d6 at 11th level (2d6) and again at 17th level (3d6).