Warband

Hostile mobs are given an AI overhaul. Mobs gather into tactical squads with leaders, bruisers, marksmen and support roles, and they use morale, regrouping and flanking. When a squad loses track of a player, it searches the last known position rather than giving up at once. Regional difficulty scales with distance from spawn, depth and dimension, and it eases off in areas where a player is dying often, which is the mercy setting. Multiplayer presence is taken into account, with threat memory and anti-dogpile targeting so that several players do not draw the whole local force at once.

Illager factions hold grudges against each other, send bounty hunters after players and keep strongholds, and a named illager that escapes may return changed by how it was beaten, at times immune to fire or wearing a helmet. Modded mobs can opt into Warband's behaviour pools through customMobPools and gain matching tactics and roles, and vanilla counterparts join squads with them. The mod is server-side only and works on an existing world. Fabric API is required. Warband is open source under the MIT License and is published for 26.1 – 26.2, with the latest Fabric file, 1.5.0, built for 26.2 on 2026-09-14.