While I didn't catch the Season 1, I got right away in the game during Season II. I learned how to play it, how to use my monsters and step by steps, wins after loses, I succeeded to reach up to Silver III League. That got me 4 Booster Packs which rewarded me with new monsters that joined my army.
So, without many other words, let's see what monsters I discovered when opening the packs.
Pack 1 - rewarded me with 2 RARE monsters
Pack 2 - rewarded me with 2 RARE monsters
Pack 3 - rewarded me with 2 RARE monsters
Pack 4 - rewarded me with 1 LEGENDARY monster
And now is just a matter of waiting for Season 3 and see what it deserves for us. My army is well rested and hope he will do well regardless of the new rules.