Once per turn, during your Main Phase 1: You can pay 800 Life Points; this card can attack your opponent directly this turn.
Rulings
Individual Card FAQs
You cannot activate this card's effect during your opponent's turn or during Main Phase 2.
You can only activate this card's effect once per turn.
If you activate & resolve this card's effect and then "Skill Drain" is activated, you can still attack directly because "Gear Golem the Moving Fortress"'s effect is already applied and it's still applied even if "Skill Drain" is activated.
EARTH|
Level 4|[ Machine / Effect ]
ATK 800|
DEF 2200