Number S38: Titanic Galaxy

3 Level 9 LIGHT monsters
You can also Xyz Summon this card by using "Number 38: Hope Harbinger Dragon Titanic Galaxy" you control (transfer its materials to this card). Gains 200 ATK for each material attached to it. Once per turn: You can target up to 2 Spells/Traps your opponent controls; attach them to this card as material. Neither player can activate those cards or their effects in response to this effect's activation. You can detach 1 material from this card; until the end of this turn, this card's original ATK becomes 1500, also it can attack directly.