If you have xmlspawner already installed in your repo,you can just add:
XmlAttach.AttachTo(this, new TemporaryQuestObject("Kryss", 60)); //60 = minutes."
So your code go as this:
Add this in top of your script:
using Server.Engines.XmlSpawner2;
public LesserFateOfFortunes() : base()
{...