The necromancer chooses a 10"x10"x10" cube within range.   Immediately the area is partially merged with the Shadowfel, with shadowy grasping tentacles, talons and limbs immediately grasping at all creatures n the space.   All targets must make an intelligence savings throw or take 3x necromancers proficiency bonus in necrotic damage and is restrained. On a successful save a target takes 1x necromancers proficiency bonus in necrotic damage and has movement reduced by half until the start of the necromancer's next turn.   At the end of each of its turns, the target can make another savings throw. On a success the spell ends, the target has movement reduced by half (until the start of targets next turn) and it takes 1x necromancers proficiency bonus in necrotic damage.