Special Summon this card as an Effect Monster (Machine-Type EARTH Level 4 ATK 1000 DEF 1000). (This card is also still a Trap Card.) You cannot Normal or Special Summon other monsters the turn you activate this card. Once per turn, during your Main Phase: You can Tribute 1 Machine-Type monster; this card gains ATK equal to the ATK the Tributed monster had on the field, until the end of this turn.