Gaia Sombre, HÉROS du Mal GLAS-FR040

1 Fiend-Type monster + 1 Rock-Type monster This monster cannot be Special Summoned except with "Dark Fusion". The original ATK of this card is equal to the sum of the ATK of the Fusion Material Monsters you used for the Fusion Summon of this monster. When you declare an attack with this card, you can change all Defense Position monsters your opponent controls to face-up Attack Position. Flip effects are not activated at this time.