Annoy the heck out of your opponent by 'normal' summoning one million times per turn and completely stop them from doing anything at all.
Note that if you play this deck, you run the risk of your opponent surrendering before you even finish your combo. No, it's that long. They just realize that they have no chance to win against these birbs, either that or it just flew right over their head. On the off chance that your opponent didn't surrender after seeing your monstrous birb, however, you can shut down their play with your floodgates and then peck them to death.
Jokes aside, the birbs are VERY cute, and this deck is pretty impeckkable. Try it out.
IMPORTANT: You absolutely need Lucky Straight in your extra deck. He will watch over you and make sure you don't brick your hand.