Expose Vulnerability
0-level (Cantrip) Divination
Casting Time: 1 Action
Range/Area: 30ft
Components: V,S
Duration: Indefinate
Cast on a target you can see and have dealt damage to at least once. You expose a considerable weakness on that target, that when knowingly attacked has -1d6 AC. If this would cause a negative AC, the AC is instead lowered to zero and a second weak spot that is revealed to you with the remaining AC removed (it cannot go into the negatives). You may alert your allies to any weak spot you know as a bonus action on any turn.
At higher levels: If cast at 1st level, the AC removed is instead 1d8, at 2nd level the AC removed is 1d10 and at 3rd level the AC removed is 1d12.
Available for: Wizard, Sorcerer, Warlock, Cleric, monk, Paladin (as a first level spell)