Number 27: Dreadnought Dreadnoid (Secret Rare) [BLRR-EN030-SeR]

2+ Level 4 monsters
If this card destroyed an opponent’s monster by battle, at the end of the Battle Phase: You can Special Summon from your Extra Deck, 1 Rank 10 or higher Machine Xyz Monster by using this card as material. (This is treated as an Xyz Summon. Transfer this card's materials to the Summoned monster.) You can only use this effect of "Number 27: Dreadnought Dreadnoid" once per turn. If this card you control would be destroyed by battle or card effect, you can detach 1 material from it instead.