Ancient Gear Fortress [SR03-EN022] Common Spirit Monster you can select and activate

you can select and activate 1 of these effect: •Destroy Spell or Trap Cards on the field up to the number of "Elemental Hero" and "Destiny Hero" monsters you control (not counting this card)

You can only use each effect of "Duoterion" once per turn

In addition

you can have this card lose 500 ATK and DEF

To Tribute Summon this card

Ancient Gear Fortress [SR03-EN022] Common Spirit Monster you can select and activateSet: Structure Deck: Machine Reactor Card type: Continuous Spell Rarity: Common During the turn they were Normal or Special Summoned, your opponent cannot target "Ancient Gear" monsters you control with card effects, and they cannot be destroyed by your opponent's card effects. Your opponent cannot activate cards or effects in response to the activation of "Ancient Gear" cards and effects. If this card is destroyed in the Spell & Trap Zone: You can