LiskovExample.cs

using System;
using UnityEngine;

public class Warrior : MonoBehaviour
{
    public int Armor { get; set; }
    public int Life { get; set; }

    public virtual void Attack()
    {
        // Attack to closest enemy
    }
    
    public virtual void TakeDamage(int damage)
    {
        Life -= Math.Max(0, damage - Armor);
    }
}

public class Mage : Warrior
{
    public int MagicProtection { get; set; }
    
    public override void Attack()
    {
        // Throw a Fire to target
    }

    public void Hex()
    {
        // Convert target to sheep
    }
    
    public override void TakeDamage(int damage)
    {
        Life -= Math.Max(0, damage - Armor - MagicProtection);
    }    
}