Booster packs contain 10 cards, made up of 5 commons, 3 uncommons, 1 rare, and 1 plastic dragon/gear/crew card.
bˈuːstɚ pˈæks kəntˈeɪn tˈɛn kˈɑːɹdz, mˌeɪd ˌʌp ʌv fˈaɪv kˈɑːmənz, θɹˈiː ʌŋkˈɑːmənz, wˈʌn ɹˈɛɹ, ænd wˈʌn plˈæstɪk dɹˈæɡən slˈæʃ ɡˈɪɹ slˈæʃ kɹˈuː kˈɑːɹd.