Fusion Summon 1 "Dream Mirror" Fusion Monster from your Extra Deck, using monsters you control as Fusion Material.
If "Dream Mirror of Joy" is in a Field Zone, you can also use monsters in your hand as Fusion Material.
If "Dream Mirror of Terror" is in a Field Zone, you can also banish monsters from your GY as Fusion Material.
You can only activate 1 "Dream Mirror of Chaos" per turn.