Fabric Wiki

To add enchantments to your mod, you'll need to:

• create a class that extends Enchantment or another existing Enchantment (such as DamageEnchantment)
• register your enchantment
• add custom functionality or mechanics if needed
• add translations for your enchantment ¹⁾

Enchantments can either have custom functionality implemented separately (such as smelting ores mined) or can use already existing mechanics (such as DamageEnchantment), which are applied when appropriate.

We'll be creating an enchantment called Wrath, which adds an extra 1.5 points of damage, per level, to a melee weapon. The easiest way to do this is by creating a class that extends DamageEnchantment:

public class WrathEnchantment extends DamageEnchantment 
{
    public WrathEnchantment(Weight weight, int typeIndex, EquipmentSlot... slots)
    {
        super(weight, typeIndex, slots)
    }
 
    @Override
    public float getAttackDamage(int level, EntityGroup group)
    {
        // ....
    }
 
    @Override
    public int getMinimumPower(int int_1)
    {
        // ....
    }
 
    @Override
    public int getMaximumLevel()
    {
        // ....
    }
 
    @Override
    public boolean differs(Enchantment enchantment)
    {
        // ....
    }
}

getAttackDamage, as you would expect, is the additional damage provided by the enchantment. level is the level of the enchantment:

public float getAttackDamage(int level, EntityGroup group)
{
    return level * 1.5f;
}