Perhaps the single best equipment card MTG has ever released (and a strong contender for the best MTG card too), Skullclamp was so game-warping that Aaron Forsythe of R&D had to write an article
Silas Renn, Seeker Adept, Bruse Tarl, Boorish Herder, and Akiri, Line-Slinger are all cards I could see myself building single decks around
the line for whats bad in Magic is subjective, especially in Commander
Sharkey, Tyrant of the Shire FromTheShire: This may not seem like it does a ton, but if you start paying attention in your games you'll find a surprising number of utility lands in your meta that this both stops and lets you steal
Omnath gets +1/+1 for each unspent green mana you have
During todays panel, fans in attendance were given a first look at some of the spectacular cards coming to the set, including: Showcase Scene cards, which combine to form a stunning scene that looks like it came straight out of a comic book