Him

The entity stays close to nearby players and picks out hostile mobs that approach them. When a threat gets close enough to land a lethal attack, Him steps in to interrupt it, then carries out a rescue execution sequence against the attacker. The design is built around one overwhelming protector rather than a group of allied creatures.

Him is meant to feel deliberate and dominant, operating beyond the normal rules of survival instead of behaving like a standard companion mob. It is a Forge mod for 1.20.1 only, and it runs on client and server, so the server and every player need it. Versions and licensing follow the mod's own release, with the MIT License covering the code; the project is not open source.