This is just a nice tool to play a value game with token makers and creatures that generate value with other enters-the-battlefield abilities that is balanced in a way that makes it far more likely to run out of gas than Recurring Nightmare
these Booster Packs can be found in products like Booster Boxes, Collection Boxes, Elite Trainer Boxes and Tins
As for Ral Zarek, himself, I kind of imagine him seeing moderate success as a random one- or two-of in some U/R/x control decks, but more interestingly, I imagine someone building a new kind of blue aggro or midrange deck that actually takes advantage of Ral Zareks ability to remove blockers or do six to the face
decks running cards like Return from the Different Dimension that bring back banished creatures
3) Procedural Error
With that math in mind, if you want your deck to reliably make 4 land drops in the first 4 turns of the game, you should start with 36-39 lands and tweak from there