7 mana 7/7, if you won the game, win the game. lol
In all seriousness, there's probably SOMETHING that can abuse this. I just don't know what.
EDIT: does this mean 3 OTHER minions with 7 Health? It's worded the same way as Fight Promoter so you might only need 2 other 7 Health minions. (This is also made much worse by the fact that if your minions have MORE than 7 Health they don't count so I don't think this is playable.)
I haven't played Shudder at all, but is there a way to boost its health on battlecry before duplicating it? That's the only way I see this playable, or in an evolve shammy where it's useless by that point.
If this counts as one of the 3 then it's potentially doable but the problem is it doesn't say AS LEAST 7 health. It says 7 health which leads me to believe it has to be exact, so Glitter Moth shenanigans wont work. I wouldn't mind opening a gold version of this though, I'm sure that artwork is top notch.