You still have some beginner cards. they're to get you started playing and hooked into the game. When it comes down to it though you will get stomped a lot with them.
Un67 preset has a Roots half that is dirt Cheep and effective till the end game. Absolute best investment for any beginner would be to get those. Mix and match them with any other clan (Rescue not recommended)
The Urban Rivals team is made by lovers of all kind of Collectibles Cards Games and Trading Cards Games like: Magic the Gathering, Dominion, Vampire, Yu-Gi-Oh!, Pokemon, Wakfu TCG, Assassin Creed Recollection, Shadow Era, Kard Kombat and Might & Magic Duel of Champions.