How about a server that you have 5 mins to gather stuff from chests around the map, then the lava starts rising. If you fall in the lava and die, you lose. You will be pushed away if you try to stand on the same block as someone else. You are trying to survive by getting as high as possible. You want other people to live, but you are more important. Every time the lava comes up, you gain one point. If you are the last man standing, you get 50 points. Every time you hit someone, you lose a point. You use points to get powerups and other random stuff. Mobs will try to push you in the lava. You will be able to starve.