Where to get Promo cards?

[VukanBoss 0]

I played a game alot in past , so i just wondering is there any chance to get promo cards ? Or better question , how i can get it and others , paying for it or something else ? Thanks

[Kubik 163]

you can open boosters and each time you do there is 0,5% chance to find a promo (average 1 in 200 boosters)

you can check the auction house or trade channels and pay for it, if you think you have enough