Spell Vulnerabilities is lightweight Fabric mod that gives you complete control over how each mob in your world resists or succumbs to different schools of magic spells.
With just a few lines in a simple JSON config, you can tune every creature’s Fire, Frost, Arcane, Healing, Lightning (and more!) affinities.

Key Features:

Per-Entity Tuning
Define resistances and vulnerabilities on a per-mob basis or a list of mobs that will share the same modifiers
(can also include entities from other mods).
Want Zombies to take 75% less Soul damage but 190% more Arcane damage? Easy:

"entities": [

"minecraft:zombie"

"modifiers": {

"spell_power:soul": -0.75,

"spell_power:arcane": 1.9

}

All Major Spell Schools
Support for any spell_power:<school> attribute from Spell Engine & Spell Power Attributes:

spell_power:air
spell_power:arcane
spell_power:earth
spell_power:fire
spell_power:frost
spell_power:healing
spell_power:lightning
spell_power:soul
spell_power:water

Configurable
Everything loads at startup from config/spell_vulnerabilities.json. —just edit the JSON and restart.
Come with 2 premade entries for the Blaze, Ghast and Piglin (25% fire spell resistance, 50% frost spell vulnerability)
and the Enderman (75% arcane spell resistance):

{

"enable_button": true,

"button_x": 16,

"button_y": 4,

"vulnerabilities": [

{

"entities": [

"minecraft:blaze",

"minecraft:ghast",

"minecraft:piglin"

"modifiers": {

"spell_power:fire": -0.25,

"spell_power:frost": 0.5

}

{

"entities": [

"minecraft:enderman"

"modifiers": {

"spell_power:arcane": -0.75

}

]

}

Stylized List
A new button in the player inventory that open a new screen with neat list of all the entries from the config, come with a search bar to search by entity/mobs name!

Require Spell Engine & Spell Power Attributes [Fabric]

Recommended with Wizards (RPG Series), Elemental Wizards (More RPG Classes) and other mods that use spell power attributes.
To get entities/mobs id recommend to use Data ID Dumper [the id's will be in the entities_ids file]

This mod is just one simple, short mixin, screen class and gson config✨