Yubel - The Ultimate Nightmare [RYMP-EN072] Rare Secret Rare You can only use this

You can only use this effect of "Prank-Kids Bow-Wow-Bark" once per turn

or 1 Fusion Monster you control that lists "Cyber Dragon" as a Fusion Material Monster

while you control a "Red Dragon Archfiend": Your opponent takes twice the effect damage you would have taken

You can only activate 1 "Magical Meltdown" per turn

When a Level 4 or higher monster(s) is Normal or Special Summoned: Change that monster(s) to face-down Defense Position

Yubel - The Ultimate Nightmare [RYMP-EN072] Rare Secret Rare You can only use thisSet: Ra Yellow Mega Pack Card type: Effect Monster Rarity: Rare Attack: 0 Defense: 0 Cannot be Normal Summoned or Set. Must be Special Summoned by "Yubel Terror Incarnate", and cannot be Special Summoned by other ways. This card cannot be destroyed by battle. You take no Battle Damage from battles involving this card. At the end of the Damage Step, if this face up Attack Position card battles with an opponent's monster: Inflict damage equal to that