DIMENSION POWER, PART 1 "Lekunga" lets you remove from play 2 WATER monsters in your Graveyard to Special Summon a Monster Token. This keeps the amount of monsters you control higher, by using the WATER monsters your opponent destroys to create new ones. "Chaosrider Gustaph" has a similar effect, which allows you to remove from play Spell Cards in your Graveyard to increase his ATK points. Having these monsters in your Deck allows you to get additional uses out of the cards after they are sent to your Graveyard. In addition, they build up the amount of cards that you have removed from play, allowing you to use powerful cards like "Chaos End", which will destroy all your opponent's monsters! - click here for another Dueling Tip.