Stronghold the Hidden Fortress
Special Summon this card as an Effect Monster (Machine/EARTH/Level 4/ATK 0/DEF 2000) with these effects. (This card is also still a Trap.)
● Gains 1000 ATK for each card you control that is "Gold Sarcophagus of Light" or a monster that mentions it.
● Once per turn, when an opponent's monster declares an attack while you control "Gold Sarcophagus of Light": You can destroy that monster.