cards/CardDolphin.cs
using Sandbox;
using System.Threading.Tasks;
using System.Xml.Linq;

public class CardDolphin : Card
{
	public override bool IsAlive => true;

	public override bool ShouldHandleEvent( EventType eventType )
	{
		return eventType == EventType.Mismatch && !Manager.Instance.ChosenCards.Contains(this) && Manager.Instance.Stats[StatType.ConsecutiveMismatches] == 3;
	}

	public override async Task HandleEventAsync( EventType eventType )
	{
		Manager.Instance.PushEventMessage( this, eventType );

		await Task.DelayRealtime( 250 );

		Manager.Instance.PlayCardSfx( "card_flip", this, volume: 0.8f, pitch: Game.Random.Float( 1.15f, 1.2f ) );
		await Task.DelayRealtime( 100 );
		Manager.Instance.PlayCardSfx( "dolphin", this, volume: 0.8f, pitch: Game.Random.Float( 1f, 1.15f ) );
		await Manager.Instance.RevealCard( this );

		await Task.DelayRealtime( Game.Random.Int(400, 700) );

		Manager.Instance.HideCard( this );
		Manager.Instance.PlayCardSfx( "card_flip", this, volume: 0.7f, pitch: Game.Random.Float( 0.65f, 0.75f ) );

		Manager.Instance.PopEventMessage();
	}
}