Undead Coercion

As a bonus action you can touch a creature, and deal 1d4 damage. If this kills said monster you can make them into an undead servant for 1 hour. They however will decompose quickly, and lose lose 1 stat in Constitution every round, but will do 1 extra necrotic every time. At level one you can coerce up to 3 monsters, this increases by 2 every level. The creature can make a charisma save when first touched to break the chains of servitude put upon them.