VATS (Vulnerability Amplifying Targeting Spell)

Your spell imbues a creature you touch with enhanced focus and accuracy. As a bonus action, the target of the spell may mark a creature to focus on. Each attack the target makes against the marked creature gains one of the following benefits (made before the attack roll). Any saving throws made are against your spellcasting Save DC.

* Head: The hit becomes a critical hit (Con save)

* Torso: The attack is made with advantage

* Weak point: The hit ignores resistance (but not immunity) to the attack's damage

* Leg: The hit knocks the target prone (Dex save)

* Arm: The hit Disarms the creature of one item they are holding in their hand (Str save)

Once a creature has been marked, it remains until the spell ends or the target uses a bonus action to focus on a new creature.