Discard as a Theme The idea here is that discard can function as a win condition (in that it can control the game to the point where any small thing can win) and as such is able to carry a theme for a deck
Preeminent Captain The free attacker from your hand, ninjutsu-like ability on Preeminent Captain is so busted (remember Captain of the Watch?) since it disregards white's desperate need for ramp
Get your hands on these dark reflections of MTG legends today, alongside other rare finds in Phyrexia: All Will Be One
Unless youre desperate and are willing to basically give your collection away for a fast buck, stick with the other guys I talked about above (eBay, TCGPlayer, etc.) RUNNER UP: Star City Games is definitely another place you should consider for selling your Magic cards
-- At the end of the day, these are just my personal thoughts and choices on these new planes
Commander players love the format for its diversity of strategies and power levels