Graveyard Control refers to a strategy of controlling what can harness the power of the Graveyard. Perfect Circle Decks and DARK Decks rely heavily on being able to readily harness the Graveyard. For the longest time, Gravekeeper's Decks prevented the opposing player from being able to use cards like "Premature Burial" and "Monster Reborn", but this has long-since become inadequate; effects that activate in the Graveyard are increasingly commonplace, and are an increasing part of overall Dueling Strategy.