How to Host a Tensura Evolutions Server (NeoForge 1.21.1 Setup Guide)

Start with at least 8GB of RAM dedicated to the modpack. Tensura Evolutions builds its skill and magic systems — the core of the That Time I Got Reincarnated as a Slime experience — on NeoForge 1.21.1, and that combination needs more headroom than a plain survival pack of the same mod count.

Import the official server pack directly through CoalHost's panel instead of assembling the mod list by hand. The pack's skills, races, and progression mods are tuned together to work as one system, and installing from the real server pack keeps every piece wired up correctly from the first boot.

Watch the console through the first boot until the world finishes generating and the loading screen clears. With a skill and magic system this central to the pack, mod-loading errors or missing dependency warnings are worth catching in the log before anyone starts building a character around a broken system.

Only open the server to players once that first boot has completed cleanly. Letting players start choosing races and skills while the underlying systems are still mid-initialization is the easiest way to end up with a character build that silently breaks on the next restart.

Take a backup before importing an existing world, updating NeoForge or any mod, or editing bundled configs. Character progression in Tensura Evolutions — skills, race evolutions, magic levels — is the whole point of the pack, and a bad update can wipe hours of that progress in one restart.