Just a whole lot of rares crammed into one spot
Rotating proxies per session or even per request keeps your traffic looking like it's coming from different households rather than one very enthusiastic server
Other cards in this category include: Birds of Paradise produces mana of any color, and also flies
While his 5 toughness is nothing to scoff at, I would be reluctant to push him onto the frontlines for the sake of his trigger
The current Standard format has quite a fantastic array of sets available to make decks with right now (Sword and Shield, Rebel Clash, Darkness Ablaze, Champions Path, Vivid Voltage, Battle Styles, Chilling Reign, Evolving Skies, Fusion Strike)
Drawing 2 cards can give you that little extra nudge that can win you the game, which if you ask me, is well worth the 10 cards you werent using anyway