I can see warlock playing this, maybe quest shaman, although I don't think it's obvious in either case - but I can't see why you would think this will be good (much less great) in any of the current rogue builds...
Hand size is already a frequent challenge due to Galakrond and Tog. Generating "endless" lackeys is, well, not.
Protecting your health against aggro is a weakness of rogue, due to lack of survival tools. Generating insane value is already a strength.
It's an understated minion that's only effective at 6-7 mana. It's limited by a finite board and hand size. You can dream up scenarios where this works, sure, but that's true of most legendaries. Someone mentioned Troggzor, which seems fitting in my opinion.