They generate mana through land drops, which is something you want to do every turn, anyway
Japanese cards are generally more expensive than English cards, especially when it comes to rare or exclusive cards
Design (both visual and game design) should be working together against complexity
Its our best answer to Leyline of Sanctity, Urzas Saga, and Underworld Breach if you expect to play against those, consider adding it to the mix
Unopened packs will be converted into crystals, with the following exchange rate: 1 to 9 unopened items in PTCGO = 250 Crystals awarded in Live 10 to 24 unopened items = 550 Crystals 25 to 49 unopened items = 1,125 Crystals 50 to 124 unopened items = 2,350 Crystals 125+ unopened items = 6,200 Crystals Excess cards over 4 and packs over 125 will be discarded, as a warning
A few things jumped out as I compiled this list