For Challenge # 134.

Ha! Wow. Okay, I buy your arguments on gigamorph, but there must be rather less room for creatures that inherently give 2-for-1 card disadvantage. At best, your opponent chooses not to attack or block with the creature you've given them, and you've spent to not impact the board at all. At worst, they beat you up with a 2/2 for a bit, then find ways to take advantage of the drawback creatures you give them once you find time in your mana curve to unmorph the thing. Yow.

Put another way, I suspect this card would be too bad even if you paid rather than to cast it face-down.

That's what I was thinking. Even if there are morphtrap cards that punish the opponent for not attacking and they have to guess whether to use the creature or not, it seems the absolute best case is that you pay 4W, and give the opponent a 5/5 blocker, to gain 5 life. That doesn't seem like a good deal. I mean, actually the card is better than that, because often, a 5/5 blocker for 2W is quite good if you just play it unmorphed, but that undermines the keyword...

I like the idea though. If there's some way of making a "2/2 with downside" to the opponent a fair cost, so the opponent then has to guess if it's safe to use but isn't already ahead. Or if unmorphing gave you the creature back, but also some bonus if the opponent guessed wrong?

Made Root-Buster Wurm as way of explanation. I know I'm not answering the problem directly, but it was a follow up I was planning on making anyway.