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

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

	public override bool ShouldHandleEvent( EventType eventType )
	{
		return eventType == EventType.LoseHP && Manager.Instance.HoveredCard == this;
	}

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

		await Task.DelayRealtime( 100 );

		if ( IsRevealed )
		{
			Manager.Instance.PlayCardSfx( "vampire", this, volume: 0.9f, pitch: Game.Random.Float( 0.95f, 1.05f ) );

			await Manager.Instance.ShakeCard( this, playSfx: false );
		}
		else
		{
			await Manager.Instance.ShakeCard( this );
		}

		await Task.DelayRealtime( 600 );

		if(IsRevealed)
			Manager.Instance.PopEventMessage();
	}
}