Rat Toolbox

Rat Toolboxes (or ratboxes) use Giant Rat to summon a card that can counter whatever your opponent has at the time. The deck is an aggro deck that can summon several great offensive monsters to overwhelm the opponent.

Cards good for a ratbox: Giant Rat, obviously Cyber Dragon just because it's an offensive deck Card Trooper Injection Fairy Lily Exiled Force

You may also want to think about using Inferno Reckless Summon to summon multiple monsters with Giant Rat's effect.