The card draw alone is enough reason to play this card, but in any control shell, you can make that second ability not even a downside and eventually win off the first ability
So when you actually cast Emrakul it is absolutely the best at winning the game as it comes with a free Time Walk
In fact, while it's the largest price movement we've seen, Aetherworks Marvel isn't the only card spiking off the back of the Energy craze
A year ago, I was an experienced deck-builder, a somewhat accomplished EDH player, a guy who organized and ran my LGS's EDH League, and a columnist for this fine website
This one I really like too, since it encourages interactivity with the card and artwork without restricting players movement (It restricts what cards your opponent plays, but a lot of normal cards can do that)