A new idea for a multiplayer format occurred to me.
A player wins if any zone of his capital has not been attacked for X consecutive turns. For now, lets have X = 4. Effects that cancel damage to your capital do not count for now which is why I used "not attacked" and not "dealt damage".
I am worried about whether games will get too long, or if one deck will get too strong. I dont have a large player base here to test out my idea so I am posting it to see if other people like it and if I can get suggestions to improve it.