WotC era Bulk - store it or flip it
Planeshift was about ally colors, like Invasion , and Apocalypse was about enemy colors, so that helped distance themselves from one another
For competitive, the most useful cards are probably Leaf and Mew Ex, maybe Serperior and Celebi Ex if they ever become meta again, but not much else
For the past month, streamers of all sorts have taken the plunge into a deep pool of nostalgia
though very straightforward and less powerful than, say, Professors Research, which allows you to discard your hand and draw 7 cards, its that first turn caveat which makes Carmine so appealing
On counterfeit cards, blacks are not always black, they can have colored artifacts intermingled amongst the solid areas