A lot of the early characters that you bring into play have a low strength, so Only So Much Room is going to be useful at mitigating that, forcing one of those cards back into your opponents hand, while allowing you to get a character card back from your own discard pile
If your deck is big mana (battlecruiser, X-spells, huge haymakers) Go heavier
Even with those in place, it feels so good turning an Aether Adept into a Cancel or a Skinrender into Damnation
Collectors got a nice little treat when Magic: The Gathering released Foundations, a set that is going to be in Standard for the next few years as a solid basis for players to build decks and collections around
Question Can I use more than one color per deck
You can achieve an alternate win condition with Phyresis attached to Syr Konrad, the Grim and 10 activations of Tortured Existence to poison players out