This card is pretty decent for what it does. I mean, it's one mana for an Instant-speed kill spell. What more could you ask for? Sure, it only targets one type of creature, but that's what Artificial Evolution is for, right? All-in-all, a decent card.
Pros: One maan kill spell
Cons: Only targets Walls
P.S. I know this review is short, but what do you expect from this card?