So, starting with Season 4 there are no more Booster packs for doing daily quests or at the season end. They are now replaced by Reward edition cards.
I've earned some of the new edition cards. This one I find quite interesting:
for its magic reflect ability. I've tested it in one battle, although the opponent's deck didn't have as many monsters with a magic attack as I thought, and it performed quite well. But the level I play is still in the lower leagues for now.