|Number 31: Superdreadnought Railrobo Union Raiden Ultima|
|Type(s)||[ Machine/Xyz/Effect ]|
|ATK / DEF||3100 / 2750|
Lore3 or more (max. 5) Level 10 Machine-Type Type monsters
Once per turn, during your Main Phase, you can attach 1 Machine-Type monster from your hand to this card as Xyz Material (max. 5). During your Main Phase, you can Tribute this card, Special Summon as many monsters attached to this card as Xyz Material as possible to your side of the field. You can only this effect of 1 "Number 31: Superdreadnought Railrobo Union Raiden Ultima" per turn.