I got once again the same Earth splinter which I have to play 5 ranked battles. This is from my main account which I play few and far between as per my wish when I got free time. This deck isn't impressive at all that's why I don't look much at it. But I opened it up and see I got a daily quest with earth Splinter. This was super easy for me.
I won all of the battles continuously and completed my quest within short period of time. I got the Goblin Mech card as a reward. I don't use this card much. I may use it to combine with another one which I have in my account.