You get a pretty good ability once you get your auras on the creature and flip it, and being able to move your auras around and dodge removal is pretty good
skill [edit] Magic , like many other games, combines chance and skill
Since many rats care about the number of rats you have, cards like Pack Rat, Ogre Chitterlord and Vren, the Relentless are enablers and payoffs for the strategy, creating rats that grow in sequence with one another
Next turn, these can bring in Gray Merchant of Asphodel, Puppeteer Clique, or Phyrexian Delver, which in turn can find Disciple of Bolas, Pitiless Plunderer, or Vindictive Lich
Playing for keeps in a four-player game is probably a bad bet anyhow