The sheet was made in 1998, and is made up of 99 Pokmon cards in total, which were printed out, but never cut up into individual cards and sold
You also need to have the cards to discard up front so you cannot play these on an empty hand making them frequently awful top decks
Serum Visions is notable for allowing you to draw first, and then scry, setting up your next two draws with something desirable or something
Instead, the partner with pairs allows WotC to dig into a design space thats too specific to be broadly applied, and it lets them test out very specific play patterns
Ultimately, we decided that banning The Meathook Massacre was the best choice, as it's one of the most powerful black cards in the format, is especially powerful against specific archetypes (decks relying on a lot of small creatures), and has had its time to shine in Standard for over a year." I can't be upset about The Meathook Massacre going away