Players roll for Attack and Defense
I was looking to try an old variant rule that lets the players roll for Defense when attacked by an NPC. Other systems use this method, and some of my players like how it keeps them more engaged when it isn't their turn. I'm having trouble figuring out how I could implement this with fantasy grounds. I want the PCs to actually roll the dice rather the be automated. Setting up something like a custom save (if that is even possible) wouldn't cut it as that would just be a convoluted (and automated) way to do what is already done with attack/ac. I am thinking it would be implemented like an opposed skill check, with the attacking NPC just having a fixed rather than random value. That could work, but is there a way to use the current AC (or current AC modifiers) as a modifier to a d20 roll? Ultimately, I would like to make a die roll that would be 1d20 + AC - 10 OR 1d20 + (AC Modifiers). Is there a way to point to AC in this way? Or is there a better way to implement this idea in general?