The Master Rules came into effect in the OCG with the release of Starter Deck 2008. * Introduced Tuner monsters, Synchro Monsters and Synchro Summons. * Introduced terminology changes: * Sacrifice Summon → Advance Summon * Sacrifice → Release * Fusion Deck → Extra Deck * Introduced limitations on the number of cards allowed in the Deck. * Main Deck: 40-60 cards * Extra Deck: 0-15 cards * Side Deck: 0-15 cards