Ancient Gear Gadget [SR03-EN000] Ultra Rare Duel Power But the mysterious thing is

But the mysterious thing is that its memory i

or Special Summoned by Tributing 1 Level 10 "Ultimate Crystal" monster (in which case you do not use "Polymerization")

Set: 2017 Mega-Tins Mega Pack Card type: Field Spell Rarity: Rare During your Main Phase

discard all those Spell Card(s) to the Graveyard

This effect can be used only once while this card is face-up on the field

Ancient Gear Gadget [SR03-EN000] Ultra Rare Duel Power But the mysterious thing isSet: Structure Deck: Machine Reactor Card type: Effect Monster Rarity: Ultra Rare Attack: 500 Defense: 2000 If this card is Normal or Special Summoned: You can declare 1 card type (Monster, Spell, or Trap); this turn, if a monster you control attacks, your opponent's Spell Cards, Trap Cards, or monster effects (whichever was declared) cannot be activated until the end of the Damage Step. Once per turn: You can declare 1 "Gadget" monster's card name;