Machina Fortress [SDMM-EN001] Ultra Rare Tuner/Effect Monster This effect cannot activate if

This effect cannot activate if multiple cards/effects with the same name were activated in that Chain

" Right Arm of the Forbidden One" and "Left Arm of the Forbidden One" in addition to this card in your hand

You can only activate 1 "Harmonic Synchro Fusion" per turn

you can destroy the monster immediately with this card's effect without flipping it face-up or applying damage calculation

You can only Special Summon "Nightmare Apprentice" once per turn this way

Machina Fortress [SDMM-EN001] Ultra Rare Tuner/Effect Monster This effect cannot activate ifSet: Structure Deck: Machina Mayhem Card type: Effect Monster Rarity: Ultra Rare Attack: 2500 Defense: 1600 You can discard Machine Type monster(s) whose total Levels equal 8 or more, then Special Summon this card (from your hand or Graveyard). When this card is destroyed by battle and sent to the Graveyard, select and destroy 1 card your opponent controls. When this face up card you control is targeted by an opponent's Effect Monster's effect, look