Legendary Monsters Fix

Short Description

LMfix is a Forge 1.20.1 compatibility and configuration mod for Legendary Monsters 2.1.15. It exposes boss defense mechanics through JSON config entries for easier modpack and server balancing.

Full Description

LMfix lets modpack authors and server owners configure many Legendary Monsters boss defense mechanics without editing Legendary Monsters itself. It can control potion effects, damage caps, projectile immunity, invulnerability frames, damage reduction, damage adaptation, natural healing, anti-cheese checks, return-to-spawn behavior, and phase reset behavior where those mechanics exist.

The default config is testing-friendly: major defensive mechanics are disabled and potion effects are allowed. Bosses can be configured individually through config/bossfix.json, which is generated after the game or server starts once.

Features
Supports Legendary Monsters 2.1.15
Per-boss JSON configuration
Potion effect control, including Cloud Golem tick-based buff clearing
Per-hit damage cap toggle and value
Anti-cheese distance check toggle
Arrow and projectile immunity toggle
Invulnerability frame toggle and tick duration
Stage damage reduction, generic damage reduction, and damage adaptation controls
Natural healing, return-to-spawn, and phase reset toggles
Testing-friendly default config with major defensive mechanics disabled
Requirements
Minecraft 1.20.1
Forge 47+
Legendary Monsters 2.1.15

Guide

1. Config File Location
   LMfix automatically generates its config after the game or dedicated server starts successfully:
   config/bossfix.json
   The project root also includes two reference files:
   D:\BOSSfix\bossfix.example.json
   D:\BOSSfix\bossfix.no_defense.json
   Restart the game or server after editing the config. The file is loaded during startup.
2. Basic Structure
   bossfix.json has two top-level sections:
   {
   "global": {},
   "bosses": {}
   }
   global is the fallback config. It is used when a boss has no explicit entry, or when a future Legendary Monsters update adds an unknown boss.
   bosses contains per-boss overrides. LMfix 1.0.3 supports boss-specific mechanic control through boss keys.
   Not every boss has every mechanic. Keeping a field for a boss that does not use that mechanic is harmless, but it will not create a new mechanic by itself.
3. Supported Boss Keys
   Use these keys inside bosses to control individual bosses:
   animated_boss
   animated_mini_boss
   cloud_golem
   possessed_paladin_boss
   new_possessed_paladin
   the_obliterator
   the_warped_one
   ancient_guardian
   annihilation_pursuer
   beheaded_knight
   endersent
   frostbitten_golem
   lava_eater
   overgrown_colossus
   posessed_paladin
   resurrected_knight
   shulker_mimic
   skeletosaurus
   withered_abomination
   animated_boss and animated_mini_boss are shared fallback entries for Legendary Monsters base classes and common logic. Keep them unless you know you do not need them.
4. Field Reference
   note: Human-readable note only. It does not affect gameplay.
   potionEffects: Allows or blocks boss potion effects. true allows effects, false blocks them. Tick-based effect clearing, such as Cloud Golem buff clearing, is also controlled by this setting.
   damageCapEnabled: Enables or disables the per-hit damage cap. false disables damage capping.
   damageCap: Per-hit damage limit. Only used when damageCapEnabled=true.
   antiCheeseEnabled: Enables or disables anti-cheese distance checks.
   antiCheeseDistance: Distance threshold for anti-cheese logic. Only used when antiCheeseEnabled=true.
   projectileImmunity: Enables or disables projectile immunity. Set this to false to allow arrows and other projectiles to deal damage.
   invulnerability: Enables or disables Legendary Monsters custom invulnerability frames or short invulnerability logic.
   invulnerabilityTicks: Invulnerability duration in ticks. 20 ticks = 1 second. Only used when invulnerability=true.
   damageReduction: Enables or disables staged, timed, or state-based damage reduction.
   damageReductionMultiplier: Damage multiplier for reduction logic. 0.5 means half damage, 1.0 means no reduction. Only used when damageReduction=true.
   damageAdaptation: Enables or disables damage adaptation.
   adaptationFactor: Strength of damage adaptation. Higher values make adaptation faster or stronger. Only used when damageAdaptation=true.
   phaseDamageReduction: Enables or disables phase-transition damage reduction.
   phaseDamageReductionMultiplier: Damage multiplier during phase-transition reduction. Only used when phaseDamageReduction=true.
   naturalHealing: Enables or disables out-of-combat natural healing.
   naturalHealingAmount: Healing amount per heal tick. Only used when naturalHealing=true.
   naturalHealingIntervalTicks: Healing interval in ticks. Only used when naturalHealing=true.
   returnToSpawn: Enables or disables returning, teleporting, or resetting position back to the spawn/arena point.
   resetPhases: Enables or disables phase reset after disengaging.
5. Default Config
   LMfix 1.0.3 defaults to a testing-friendly no-defense setup:
   {
   "potionEffects": true,
   "damageCapEnabled": false,
   "antiCheeseEnabled": false,
   "projectileImmunity": false,
   "invulnerability": false,
   "damageReduction": false,
   "damageAdaptation": false,
   "phaseDamageReduction": false,
   "naturalHealing": false,
   "returnToSpawn": false,
   "resetPhases": false
   }
   By default, bosses can receive potion effects, arrows can damage them, and damage caps, damage reduction, anti-cheese checks, invulnerability frames, natural healing, and return-to-spawn behavior are disabled.
6. Common Examples
   Disable defensive mechanics for every boss that does not have a specific override:
   {
   "global": {
   "potionEffects": true,
   "damageCapEnabled": false,
   "antiCheeseEnabled": false,
   "projectileImmunity": false,
   "invulnerability": false,
   "damageReduction": false,
   "damageAdaptation": false,
   "phaseDamageReduction": false,
   "naturalHealing": false,
   "returnToSpawn": false,
   "resetPhases": false
   }
   }
   Enable a damage cap for one boss, for example limiting the_obliterator to 40 damage per hit:
   {
   "bosses": {
   "the_obliterator": {
   "damageCapEnabled": true,
   "damageCap": 40.0
   }
   }
   }
   Allow Cloud Golem potion effects and disable projectile immunity:
   {
   "bosses": {
   "cloud_golem": {
   "potionEffects": true,
   "projectileImmunity": false
   }
   }
   }
   Disable anti-cheese and return-to-spawn logic for one boss:
   {
   "bosses": {
   "the_warped_one": {
   "antiCheeseEnabled": false,
   "returnToSpawn": false
   }
   }
   }
   Set custom invulnerability frames for one boss, for example 5 ticks:
   {
   "bosses": {
   "possessed_paladin_boss": {
   "invulnerability": true,
   "invulnerabilityTicks": 5
   }
   }
   }
7. Notes
   The config file uses JSON syntax. Do not add a trailing comma after the last field.
   You may only write the fields you want to change. LMfix fills missing fields automatically on startup.
   If the config becomes invalid, delete config/bossfix.json and restart. LMfix will generate a fresh default config.
   For dedicated servers, edit the server instance config. For single-player, edit the client instance config.