This makes an interesting combo with Scorpions, since they still apply poison even with negative attack, sort of like Momentum except AI will ignore it. A player won't, in that case.
Minor CC and stat fixing, I suppose, with cards like Lava Golem and Forest Spirit, but otherwise, it doesn't seem to have much use besides the Scorpion combo, which Momentum already does. It needs another effect to give itself more variable uses.
How about "Target creature gains -1|-1 and Cloaks for 2 turns."? That also makes it a source of protection and fits the theme of concealment well.