Machina Fortress (Quarter Century Secret Rare) (RA03-EN233) - Quarter Century Bonanza 1st Edition Number_IOC-111 OR when a Normal Spell/Trap

OR when a Normal Spell/Trap Card is activated: You can detach 1 Xyz Material from this card

Card TextWhen this card is destroyed by an opponent's attacking monster and sent to the Graveyard

Once per turn: You can Tribute 1 other "D/D" monster

Card TextWhen Gaia The Fierce Knight

the monster is destroyed

Machina Fortress (Quarter Century Secret Rare) (RA03-EN233) - Quarter Century Bonanza 1st Edition Number_IOC-111 OR when a Normal Spell/TrapTypeMachine Effect Monster AttributeEARTH Level Rank7 ATK DEF2500 1600 Card TextYou can discard Machine monster(s) whose total Levels equal 8 or more, then Special Summon this card (from your hand or GY). If this card is destroyed by battle and sent to the GY: Target 1 card your opponent controls; destroy that target. Before resolving an opponent's monster effect that targets this face up card, look at your opponent's hand and discard 1 card from