1. I think all the (P) cost cards need to be watched. Mental Misstep is already the most talked about card I've seen so far its impact on Legacy is going to be huge. I would grab foils from people who don't know what it's worth at launch.
2. Batterskull: I think this card is gonna push Stoneforge Mystic to even higher prices.
3. Hex Parasite: A card that can punish planeswalkers right now is really good.
4. Lashwrithe: If MBC ever is to make a comeback this card will be there to help they needed a 4 drop.
5. Sword of War and Peace: This can make a fast clock for Caw-Blade deck.
6. Torpor Orb: This card is effective against Valakut and possibly Caw-Blade to a lesser extent.
7. Birthing Pod: Cheating creatures into play is always something to be watched.
8. Melira, Sylvok Outcast: Picking this up at $3 would be wise if Infect really catches on it could be a nice way to confuse their plan.
1. Karn Liberated: Not too many planeswalkers hold the $50 price tag. I'd move Karn while he still has it.
2. Phyrexian Obliterator: Black needs 4-drops but if MBC isn't competative we'll see this around the $10 range quickly.
3. Surgical Extraction: I can see this holding it's price if Vengevine was the current problem of todays format but I see this dropping to $8 maybe even $5.