Death Grip

A grossly decayed spectral hand flies from your hand like a spear, gripping at a target creature. As an action, you can make a ranged spell attack on an enemy. On a hit, the creature takes 1d8 necrotic damage. If the target is of medium size or smaller, it must succeed on a strength saving throw against your spell DC. If it fails, then the creature is grappled.  It remains grappled until you use your action to cast any spell. The target can repeat it's strength saving throw at the beginning of their turn. 

You can use a bonus action to pull the creature back in to your melee range but doing so breaks the grapple. This does not provoke an opportunity attack.

Higher Levels: When cast at 2nd level or above, the damage of the spell increases by 1d8 per spell level.  For every 2nd level above first that the spell is cast, you can grip one additional creature of medium or smaller size (i.e. when cast at 3rd level, you can grip 3 creatures.  At 5th level you can grip 3 creatures, etc.)