Made it to Silver III with my basic Level 1 cards. Definitely not good enough here to remain for long, though. I think i've only won 2 battles when higher level cards came into the picture.
A nice string
I didn't realize that you needed to level up your summoners as well in order to play cards of a higher level. To get a cheaper summoner and max out or to go with the more pricey one. Maybe i'll put more thought into it once i have more higher level cards.
Still a long way to go for the quest...