Code For Mcreator

package your.project.package; //CHANGE. VERY IMPORTANT!

import net.minecraft.world.damagesource.DamageSource;
import net.minecraft.tags.DamageTypeTags;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.ai.attributes.Attributes;
import net.minecraftforge.event.entity.living.LivingDamageEvent;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.eventbus.api.EventPriority;
import net.minecraftforge.fml.common.Mod;

@Mod.EventBusSubscriber(modid = "seraph")
public class ArmorFixProcedure {
    private static final double EXTRA_ARMOR_SCALE = 100.0;
    private static final double MIN_MULT_AFTER_EXTRA = 0.20;

    @SubscribeEvent(priority = EventPriority.LOWEST, receiveCanceled = true)
    public static void onLivingDamage(LivingDamageEvent event) {
        if (!(event.getEntity() instanceof LivingEntity)) return;
        LivingEntity living = (LivingEntity) event.getEntity();
        if (living.level().isClientSide()) return;

         System.out.println("[ArmorFix] Event fired for: " + living.getName().getString() //debug. can be removed
                       + " with armor=" + living.getAttributeValue(Attributes.ARMOR)); //debug. can be removed

        DamageSource source = event.getSource();

        if (source.is(DamageTypeTags.BYPASSES_ARMOR)) return;

        if (!living.getAttributes().hasAttribute(Attributes.ARMOR)) return;
        double armor = living.getAttributeValue(Attributes.ARMOR);
        if (armor <= 30.0) return;

        float current = event.getAmount();
        if (current <= 0f) return;

        double extraArmor = armor - 30.0;
        double mult = 1.0 / (1.0 + (extraArmor / EXTRA_ARMOR_SCALE));
        mult = Math.max(mult, MIN_MULT_AFTER_EXTRA);

        float adjusted = (float) (current * mult);
        if (Float.isFinite(adjusted) && adjusted >= 0f && adjusted < current) {
            event.setAmount(adjusted);
            System.out.println("[ArmorFix] armor=" + armor + " extra=" + extraArmor + " mult=" + mult + " dmg " + current + " -> " + adjusted); //debug. can be removed
        }
    }
}