I've played the Midweek magic to try out Lorwyn cards in the premade jump start decks and i chose 'blighted' as an option and combined with gobline. By picking this its given me 5 plains in manabase and there is only one hybrid white card. the deck would run with 9/8 swamps and mountains and the deck now is near unplayable as i cant play the majority of my deck when i draw plains, which keeps happening. It would be great if you could edit the mana base just basic lands or if this can be changed.