Changes

'''Gemini Monsters''' (known as '''Dual Monsters''' in the [[Yu-Gi-Oh! Official Card Game|OCG]]) are a subtype of [[Effect Monsters|Effect Monster]]. They have effects, but these effects must be "unlocked" activated by performing an additional [[Normal Summon]] on Summoning them again while they are [[face-up]] on the [[Playing Field|field]] (known in the [[Yu-Gi-Oh! Official Card Game|OCG]] as a [[Second Summon]]). Until then, they are treated as [[Normal Monsters]] on the field and in the graveyard. You cannot special summon Gemini's from the hand or the deck by abilities that supports normal monsters, like "[[Ancient Rules]]", because they still count as Effect monsters while in the hand and Deck. However, since they count as Normal monsters while they are in the Graveyard, they benefit greatly from the many support cards that allow Normal Monsters to be summoned back from the Graveyard, like "[[Birthright]]".