Woww! Today might probably be the fastest completion of mine in doing the Daily Quests, allowing me to climb one rank and is now guaranteed with 15 Reward edition cards once this season ends.
As you can see below, today's quest is of the Earth Splinter and fortunately I completed it in less than 8 minutes having won all of my ranked matches for today.
For reference, I did around 15 ranked matches yesterday and the day before that just to finish my Daily Quest. XD Or basically my win rate usually for this is around 33.33% only. Lol
As for the rewards, I'm a little bit disappointed but at least my effort for today is only at 8 minutes. So all's good! XDv