Gaming Gamer GG

2 Level 4 Machine monsters
If this card is Special Summoned: You can change all monsters your opponent controls to Attack Position. If your opponent has a monster in their field or GY: You can detach 1 material from this card; send 1 Machine monster from your Deck/Extra Deck to the GY, then you can apply this effect:
●Choose 1 Machine Xyz Monster in your GY, and this card's name becomes that monster's name until the End Phase.
You can only use this effect of "Gaming Gamer GG" once per turn.