All of you are forgetting a little card called Antimatter. If you antimatter an Amethyst Dragon, you have a -12/6 creature, which can be Butterflied, then antimattered again to have a very big destroyer. Of course, this costs a grand total of 26 quanta for the creature and the effects (22 if you use a Purple Nymph to antimatter the creature twice), so it's not cost-effective at all, which leads me to my main point...
Pretty much everything in the Entropy set costs a whole lot more than everything else in other sets. The only thing that is a pretty decent deal is the dragon, but all the dragons cost between 10-12 quanta when upgraded. Entropy's quantum cost scale is off the mark and needs some tweaking. The creatures all cost five quanta, the shield is just terrible because everything else is expensive, the spells are either very expensive because the ability is so massive, or cheap because the effect is negligible (supernova doesn't count in mono). I can make a very good mono Entropy deck no problem, it's just weird to me that when I build a deck, the fastest thing I can make unupped is a mid-range creature deck with a lot of pillars and few spells, which is the bread and butter of Entropy's arsenal.
You, sir, are a mad-ass genius.
And I was actually praying for this very card a few months ago. Thank you, Zanza-deity, for answering my prayers.
Also, does Destroy overwrite existing skills? Because you could use it on a Lycanthrope, grow it, and have a 6/6 attacker with destroy.
One more thing. Why would you upgrade it? It's upgrade cost is more than it's original cost.