It comes with 340 HP again (by now you might be thinking this is the norm, but remember, that much health, by itself, is exceptional) and has two very efficient attacks that can deal a lot of damage
For example, having it in the graveyard can be more important to fuel Ox of Agonas and its Escape ability
For each opponent who doesn't, you draw a card
Another detail is that it applies whenever any of your characters quests on that turn - so if you have a line of characters ready to be exerted on a quest, you can quickly drain away your opponents lore reserves, taking them even further from victory as you advance
Now, having come up with this equation, we can solve for each component individually
Combat tricks are at their best in formats defined by racing and weak removal (like Ixalan or Avacyn Restored) and at their worst in formats defined by card advantage and powerful removal (like War of the Spark seems to be)