I opened the Giants pack as well as the Elementals pack for my Weekly Jump in Event and was given a mana split of

x13 Plains
X1 Forest
x1 Island

However, my cards are all red/green based with one card having an optional blue cost and another an optional white cost. This makes no sense and makes essentially every game I play unwinnable. there is only one other card in my deck that gives me the opportunity to play another forest or mountain for cards in my deck that require more than one forest or mountain. This deck is unplayable and with only one card having a partial white alignment my entire mana base is messed up and makes no sense.