2 Level 2 monsters
You can detach 1 Xyz Material from this card, then target 1 face-up monster your opponent controls; until the end of this turn, change its ATK to 0, also it has its effects negated. This effect can be activated during either player s turn, if this card has a The Phantom Knights card as Xyz Material. You can only use this effect of The Phantom Knights of Cursed Javelin once per turn.