I find it too hard to protect them from other creatures attacks, that can kill them with a single small blow, as in the case of our Serpentine Spy - Untamed edition.
I'll be equally blunt in telling you that I've had this card for a while and I've hardly ever noticed it and consequently never used it before, yet its ability is not bad, because they can attack opponent creatures with the lowest health from any position.
Imho, a card like this one makes sense to use it only if it has been upgraded at least at the sixth level, at the first level, like the one I have, I find it practically useless, almost a waste of place, also because 3 mana to deploy it are not few.
Probably I'm a little too bad with this Melee card, in the video I made you'll see how, considering her skill, the only thing I could think of was to put it in last deck place, unlike his kind that I usually put in the front line.
The day I'll be able to upgrade it a bit, I'll consider using it together with fire creatures, seed with which I'm not bad, in fact, until that day I think I'd rather wait because with those mana I have other ideas in mind about using it.
The current price on the market instead is a very positive note, at a little more than 9 cents you can find a lot and level it up turns out to be quite simple.