Special Summon this card in Defense Position as an Effect Monster (Machine-Type/EARTH/Level 4/ATK 0/DEF 2000). (This card is still treated as a Trap Card.) While you control a "Green Gadget", "Red Gadget", and "Yellow Gadget" , this card gains 3000 ATK.
![Stronghold the Moving Fortress [SDGR-EN030] Common](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/b49f029d-79ae-54ae-85a2-eb7cc77d9b32.png?v=1698553089&width=1445)