I Rule Over Every Dragon

Can be used when the only monsters on your field are 2 Dragon-Type LIGHT monsters. All monsters on your field are set to Level 8 until the end of the turn. On the turn you use this Skill, you can only Special Summon Rank 8/9 Dragon-Type LIGHT Xyz Monsters. If you set a Deck that fulfills the following conditions and begin the Duel, this Skill can only be used once per duel. ● Monsters in your Deck are only Dragon-Type monsters. ● Monsters in your Extra Deck are only Dragon-Type Xyz Monsters.