ReMonk(9) Lich's Corrupting Touch

This is a part of a larger project to re-do the monk class in DnD Beyond. If you want more details search for ReMonk Base in Fighter Subclasses

You learn how to savage and corrupt your opponents internal organs with barely a touch. You can choose to make your unarmed strikes deal Necrotic damage. When you hit a creature with an attack that deals Necrotic damage you can choose one Saving throw and the creature will have -2 to saves that use that saving throw until the end of your next turn. you cannot lower a saving throw past -2 using this feature or lower multiple saving throws at once. You can pick a new saving throw on each hit to swap and refresh the effect
When you score a critical hit that deals Necrotic damage to a creature, That creature suffers the effect of the Bane spell for 1 minute without concentration