using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var deck = new List<string>();

        deck.AddCards("Kudoltha", 4);

        deck.AddCards("Artifact", 8);       

        deck.AddCards("Land", 20);

        deck.AddCards("Other", 28);

​

        int iteration = 1;

        int iterations = 20000;

        double hitAll = 0;

        while (iteration <= iterations)

        {

            var sampleHand = deck.OrderBy(x => Guid.NewGuid()).Take(7).ToArray();

            if (sampleHand.Contains("Kudoltha") && sampleHand.Contains("Artifact") && sampleHand.Contains("Land"))

            {

                hitAll++;

            }

​

            iteration++;

        }

​

        Console.WriteLine($"Hits: {hitAll/iterations}");

    }

​

}

​

public static class Ext

{

    public static void AddCards(this List<string> deck, string card, int count) => deck.AddRange(Enumerable.Range(0, count).Select(x => card));

}