I got the idea from World of Warcraft. It's basically a big ring in the open world with a Treasure Chest in the middle that you need to hold O for like 10 seconds to unlock, and get the loot inside . The loot should be rare styles, or something of value like a stack of bits, among other things. In this ring, anyone in a group is on his own team. So it doesn't matter if it's only heroes or only villains, Every group goes against every group. you could go in solo if you want, or you could go in as a raid, but the loot will need to be rolled on. There should be a countdown before it starts, and once it starts, no one could get into the ring anymore. Last man standing gets to unlock the treasure chest. Unless someone was able to do it before without getting interrupted.
