When this card is activated: You can add 1 Dual Avatar monster from your Deck to your hand. If you control a Dual Avatar Effect Monster: You can Special Summon 1 Dual Avatar Spirit Token (Warrior LIGHT Level 2 ATK 0 DEF 0), also you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except Fusion Monsters. You can only use this effect of Perfect Sync – A-Un once per turn. You can only activate 1 Perfect Sync – A-Un per turn.