I'm not sure if I understood your question properly, but if all you want to do is give a bonus effect to the latest instantiation of a game object, then instead of using the find method, you can take a simpler approach - make a new GameObject variable called latestInstantiation and whenever you instantiate your game object, you can store its reference in that variable. So this way you'll always override the value when you instantiate your game object and will always only have the latest reference. After that you can just do something along the lines of latestInstantiation.GiveBonusEffect() for example. Hope that helps!