The overpowered Nick DnD weapon mastery also seems to function as it did before. The armor table now has a note for shields ...

You’ll learn about upcasting and late binding, abstract classes (which cannot be instantiated), and abstract methods (which cannot be called). You’ll also learn about downcasting and runtime ...

Even upcasting Spiritual Weapon to the same level as Mordenkainen’s Sword (7th level) will do more damage and won’t take concentration. So hopefully this spell gets some attention.

Medium objects count as one, large as two, and huge as three. Upcasting increases the damage objects deal rather than how many you can animate, and size no longer determines the object’s armor class, ...