Unity (clones) not destroying after unplay

So am i crazy to think that the (clone) objects get destroyed after i uncheck the play button in unity?
Okay this is my code to Instantiate maybe I'm doing it wrong ...

Code (csharp):

1. public Transform InitSpellClone(string n, string code){
2.  
3.         Transform clone = Instantiate (allSpells [n]) as Transform;
4.         clone.GetComponent<Spell> ().code = code;
5.         clone.parent = GameObject.Find ("SpellHolder").transform;
6.         return clone;
7.     }

allSpells is a dictionary of spells and I place the name of the spell as n.
I make it the child of a obj called SpellHolder this is just so my inspector doesn't become large.
I tried to not make it a child of anything and it still wouldn't delete so thats not it.