@pwm @bot the way I envision it is that you can make a "door" in your map that links to a door in a remote server's map.

You will carry over all your items and stats. The issue is that there's nothing to stop someone you link to from making a free super-powered item-dispenser in their world, you go over there and get all that stuff, and then come back to someone else's world with all that stuff. So, to prevent that, the main thing you can carry across will be "keys" which are just a unique identifier that a map can use to do certain things, like open a chest or something. like maybe you can carry over a sword, but it won't work as a sword in the other map, but it can work as a key.