If Dark Confidant or some other way to run away with a game were included, I would not advocate cutting all the discard
If you do, you get the city's blessing
The front side helps filter draws and fill the graveyard, while the flip side's -3 ability recasts instants or sorceries, providing repeated value
As well as gaining access to cards like Dryad Militant, Destiny Spinner, and Collector Ouphe, adding green can give you both ways to draw cards (Guardian Project, The Great Henge, Beast Whisperer) and search out what you need (Eladamris Call, Captain Sisay)
There have been videos of people from sticking the glue on one side to open the box at the back without damaging the seal
As long as you control two or more Gates, this creature has vigilance and trample