Last updated Aug 1, 2026
Custom Mobs Addon
Four arenas, one for each Custom Mobs raid boss.
This addon doesn't add any new mobs. It just gives each of the four raid bosses a proper space to fight in: The Eye, The Greatest Knight, Ragnis Tharkon, and Gorgon. Drop the arena somewhere in your world, spawn the boss in the middle, and the encounter has room to play out the way it was designed to.
How To Use
Install Custom Mobs and the four boss packs first, then paste each arena into your world with FAWE or another schematic tool. Every arena is sized for a group fight, with enough space to handle both the boss and everything it summons alongside it.
The Eye Arena
A wide, organic-looking chamber with a lot of open floor. The shape lets players spread out during The Eye's channel phases and gives everyone room to move around the projectile patterns, tornado pulls, and minions without getting pinned into a corner.
The Greatest Knight Arena
Built for a fight that starts as a duel and stops being one a couple of minutes in. The space is a dark stone pit lit by soul fire, with crossed blades set into the floor, and there's enough room for the Knight Minions, the Turret, and the Phantom Echo once it shows up without the fight ever feeling cramped.
Ragnis Tharkon Arena
Tall as well as wide, so Ragnis's aerial fire, the ground fight, and Ignis all have room to happen at the same time. The space itself is a nether cavern with lava falls down the sides and a glowing ring built into the floor.
Gorgon Arena
Gorgon is a piglin brute-type melee boss that rotates through axe skills, a spinning blade vortex, and a rapid onslaught, and periodically summons minions. She's immune to magic, poison, fire, and explosions and takes 1.6x from direct melee, so the fight favors a group with sword damage over ranged or magic builds. The layout is a circular stone platform ringed by ruined galleries, with the middle kept clear so you can kite between skill rotations without cornering yourself.
Requirements
To use these arenas you'll want:
- MythicMobs. The plugin that runs the bosses and everything they do.
- Custom Mobs. The main pack, which holds the boss roster.
- Boss The Eye.
- Boss The Greatest Knight.
- Boss Gorgon.
- Boss Ragnis Tharkon.
- FAWE. The easiest way to paste the arena schematics into your world; other schematic tools work too.
Paste the arena in, spawn the boss in the middle, and run through the fight once to make sure everything sits the way you want before opening it up to players.