Snail Mob

Jeffery begins at a set distance from the player in a fresh world and advances at a default speed of 0.5 blocks per second. He crosses mountains and oceans, follows the player into the Nether, and does not stop or sleep. A dormancy setting lets him switch to a simulated pursuit when he is far away, which reduces the load on the server.

The mod is built around an escalating campaign. A crank setting raises the difficulty to a nightmare mode, and the pursuit is paced to be a slow burn rather than a quick fight. Periodic chat messages report how many blocks away the snail is, and a beacon beam can reveal him when he comes within its radius. The whole mod can be switched off with one master setting without uninstalling it, and snails despawn cleanly when disabled.

Client and server: the server and every player need the mod. The mod is published for NeoForge only, across 15 release versions 1.21 – 26.2, and is released under All rights reserved, so it is not open source.