NeoSync

Each shell is an independent body with its own inventory, experience level, game mode and loadout progression. Shells can be parked in the Overworld, Nether, End or a modded dimension, and a player can swap consciousness between them across time and space. Crafting a Shell Constructor and powering it with Forge Energy from a connected source lets a player create new shells, while a Shell Storage block holds them and opens a radial menu for picking a destination body.

When a shell dies, the player is handed off to a remaining shell, and the original body is synced back automatically. Shell deaths do not count toward the original body. Genetic samples are taken by right-clicking with an empty hand, and a Treadmill placed in front of a lure, such as a pig or wolf, takes part in the body-sync process. A common use is keeping a stocked set of enchanted equipment in a shell that sits far away on a server.

NeoSync is licensed under the MIT License and is open source, with its source code and issue tracker public. The mod is published for NeoForge only, with 12 release versions covering 1.21.1 – 26.1.2. A server running it needs every connecting player to have it too. Curios API, GuideME, Jade and Just Enough Items are optional, and NeoSync runs fine without them.