We've got the details, and you've got the decks, so let's take a look at what you can find in An Encyclopedia of Magic
Just like Eternal Witness is usually more powerful that Regrowth because you can abuse the creatureness of it, you can flicker, bounce, or recur this for more and more lands (maybe even cards!)
When you can play it however it is Thundermaw plus, all that efficient evasive aggression combined with removal protection
You can only use the 2nd and 3rd effects of this cards name once per turn
Hydreigons Ability charges its own energy, letting it attack nearly every turn once the Deino line is complete
Magic The Gathering: Modern Masters: Booster Pack Features Age range: 13 and up / Number of players: 2 Manufacturer: Wizards of the Coast Product Attributes Age Range: 15 No Game or Puzzle Type: Strategy No Manufacturer Suggested Age: 13 and up Safety War