Sync is a neat mod that clones your player and gives you the ability to play separate lives within the same world. Each clone is capable of having their own inventory, buffs, and even gamemodes. The Shell constructor is the main cloning device that runs on “piggawatts” generated by placing a pig on a treadmill near the constructor.

Then craft a shell storage unit powered by redstone and simply walk in. You’ll see available clones to instantly trade bodies with at any given time.

You can have multiple clones of yourself and select them based on your needs. The storage units can be placed anywhere and can be accessed from anywhere, which makes it somewhat of a complicated teleporter.

The clones also function as an extra life of sorts so when you die you’ll automatically take control of one of your clones. This mod also requires an additional API found here.