A danger of new card type is a lack of ways to interact with it
Things are a little more varied with Dragons Approach decks, thanks to the ability to use the card to tutor up Dragons
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You could probably cut one of the hexproof dudes from this list, if needed, and just lean a bit more on tutors and protective enchants
Unfortunately, this plan can still be broken up with a well-time Ultimate Price or Bile Blight since the "search your library" trigger is going to go on the stack, even if you choose not to use it, although this might not be so bad
Ideally, you'll cast this midgame starting around turn three, redirect an attacker since you likely don't have a defense, and ramp you later