You can only activate this card when there is a face-up Elemental Hero Bubbleman on the field. Change 1 Elemental Hero Bubbleman in face-up Attack Position on your side of the field and 1 monster in face-up Attack Position on your opponent s side of the field to Defense Position. Tribute the Elemental Hero Bubbleman that was changed to Defense Position and Special Summon 1 monster from your hand that includes Elemental Hero in its card name.