Banish

The Ace of this deck is Gren Maju da Eiza. Its a level 3 monster that gains 400 attack per banished card and (you guessed it) this deck revolves around banishing. I've won games with Gren Maju having over 16,000 attack before. Soul Absorption is an amazing choice - 500 free LP every time a card's banished. I've also won games with over 40,000 LP before. Needless to say this deck is filthy, I came second in a tournament recently with it and only lost because of deck-out, so this is good if you want to win. Full Extra Deck but you won't use it except for Eater of Millions - Banish entire extra deck to special summon it.

Example of a good combo: Soul Absorption, Pot of Desires (5000 LP there), Gren Maju, (4000 attack there), Eater of Millions (7500 LP there + it adds 6000 attack to Gren Maju) and set Gravity Bind (LV4 or higher monsters can't attack - Gren Maju is LV3).