How to create a repository of enemy objects that are initialised but then get a new instance of a random one?

I am attempting to create a really simple turn based rpg. I have created an enemy object as follows:

 public class Enemy()
 {
     int attack;
     int hp;
     string name;
 
     public Enemy(string _name, int _hp, int _attack)
     {
         name = _name;
         hp = _hp;
         attack = _attack;
     }
 }

I then have a separate class where I create specific instances to represent possible enemies to encounter in the game as follows:

 public static class Enemies
 {
     static Enemy slime = new Creature ("Slime", 12, 2, 0, 2);
     static Enemy wolf = new Creature ("Wolf", 40, 3, 2, 5);
 
     public static List<Enemy > all = new List<Enemy > {
         slime,
         wolf,
     };
 
     public static Enemy Get (List<Enemy > enemyList)
     {
         return enemyList[Random.Range (0, enemyList.Count)];
     }
 }

However if I use this method, the Get method returns that specific instance of the enemy, when I would like for it to return a new instance (so that hp is full etc.).

I have a feeling there is a much better way of doing this, could anyone point me in the correct direction?

Many thanks,

Robin