Board Thread:Tips, Tricks, and Questions/@comment-150.177.11.18-20130919103712

What is the tier of monsters? Epic, Ultra, Super, Rare, Common? I'm just guessing... I just started playing so curious to know how to build the best team. My Epic is a 2 star while my Super Rare is a 3 star....what do the stars mean? Thanks for helping a newb out. 