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

public class CardCarePackage : Card
{
	public override bool ShouldHandleEvent( EventType eventType )
	{
		switch ( eventType )
		{
			case EventType.Match:
				return Manager.Instance.ChosenCards[1] == this;
		}

		return false;
	}

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

		switch ( eventType )
		{
			case EventType.Match:

				await Task.DelayRealtime( 50 );

				Manager.Instance.PlayCardSfxBetween( "care_package", Manager.Instance.ChosenCards[0], Manager.Instance.ChosenCards[1], volume: 1.6f, pitch: Game.Random.Float( 0.95f, 1.05f ) );

				await Task.DelayRealtime( 950 );

				int hpMissing = (Manager.Instance.MaxHP - Manager.Instance.HP);

				int moneyAmount = MathX.FloorToInt( hpMissing / 2f ) + (int)Manager.Instance.Stats[StatType.EarnExtraMoney];

				if ( moneyAmount > 0 )
				{
					Manager.Instance.PlayCardSfxBetween( "coin", Manager.Instance.ChosenCards[0], Manager.Instance.ChosenCards[1], volume: 1f, pitch: Game.Random.Float( 0.6f, 0.65f ) );

					await Task.DelayRealtime( 50 );

					Manager.Instance.SpawnGainMoneyFloater( moneyAmount, WorldPosition );

					if ( moneyAmount > 0 )
						await Manager.Instance.GainMoney( moneyAmount );

					await Task.DelayRealtime( 800 );
				}
				else
				{
					await Task.DelayRealtime( 200 );
				}

				break;
		}

		Manager.Instance.PopEventMessage();
	}
}