cards/CardCrystalBall.cs
using Sandbox;
using System.Threading.Tasks;

public class CardCrystalBall : Card
{
	public override bool ShouldHandleEvent( EventType eventType )
	{
		return eventType == EventType.Mismatch && Manager.Instance.ChosenCards.Contains( this ) && !Manager.Instance.IsMismatchALockedMatch;
	}

	public override async Task HandleEventAsync( EventType eventType )
	{
		var otherCard = Manager.Instance.ChosenCards[0] == this ? Manager.Instance.ChosenCards[1] : Manager.Instance.ChosenCards[0];

		var matches = Manager.Instance.GetCardsOfType( otherCard.CardType, except: otherCard );
		if ( matches.Count == 0 )
			return;

		var missingMatch = matches[Game.Random.Int( 0, matches.Count - 1 )];
		var misleadingCard = Manager.Instance.GetRandomCard( except0: this, except1: missingMatch, except2: otherCard );

		Manager.Instance.PushEventMessage( this, eventType );

		await Task.DelayRealtime( 200 );

		Manager.Instance.PlayCardSfx( "crystal_ball", this, volume: 0.7f, pitch: Game.Random.Float( 0.9f, 1.1f ) );

		await Task.DelayRealtime( 500 );

		if(Game.Random.Int(0, 1) == 0)
		{
			await Manager.Instance.ShakeCard( missingMatch );
			
			await Task.DelayRealtime( 300 );

			if(misleadingCard != null)
				await Manager.Instance.ShakeCard( misleadingCard );
		}
		else
		{
			if ( misleadingCard != null )
				await Manager.Instance.ShakeCard( misleadingCard );

			await Task.DelayRealtime( 300 );

			await Manager.Instance.ShakeCard( missingMatch );
		}

		await Task.DelayRealtime( 800 );

		Manager.Instance.PopEventMessage();
	}
}