Pool 6 is just the pool of common cards for the set, which means it is possible to get a pack with five common cards (due to the odds of pool 6 being selected, this happens quite often)
Black isn't exactly the color of enchantment removal, so what's a swamp player to do once this game-stopping-4-casting-cost hoser hits the table, rendering all cards Specter, Juzam, Dauthi, Sengir, and Zombie completely useless
Its worth noting that both Quicksilver Amulet does this without the Creature type restriction, and Dragon Arch does it for cheaper, but only for multicolored Creatures
Heck, even if you become the archenemy (which you often will be), getting punched in the face for 4+ damage The face commander is busted
Whereas most packs reprinted for this Legendary Collection will be available individually later this year according to Yu-Gi-Oh
Celebi EX x2 - Mythical Island Snivy x2 - Mythical Island Servine x2 - Mythical Island Serperior x2 - Mythical Island Erika x2 - Genetic Apex Sabrina x2 - Genetic Apex Professors Research x2 Potion x2 X Speed x2 Pokball x2 This is a relatively simple deck, with Celebi EX being the main Pokmon you want to use