I voted "Playable" for a weird reason. I don't think a lot of decks will actually have it, but it's a very good Discover or RNG choice like in Freed From Amber or Spiteful Summoner with an 8-mana spell.
Gosh, I dunno. On one hand, 8/8 for 8 is obviously better than 3/3 for 5, when compared to Antique Healbot. On the other hand, it don't die till turn 9 or 10, which is a lot later than turn 5. It's not as good as Ragnaros, Lightlord, but it still might be good enough to make the cut. It's also a big body from N'Zoth.