Effect
When you Xyz Summon a monster: You can Special Summon this card from your hand. Once per turn: You can detach 1 Xyz Material from a monster you control, then target 1 face-up Xyz Monster on the field; reduce its Rank by 1, and if you do, it loses 300 ATK.
The effect "When you successfully Xyz Summon, you can Special Summon this card from your hand" is a Trigger Effect that activates in the hand.
The effect "Reduce the Rank of the targeted monster by 1, and it loses 300 ATK" is an effect that targets 1 face-up Xyz Monster on the field.
When activating the effect "Reduce the Rank of the targeted monster by 1, and it loses 300 ATK," you must detach 1 Xyz Material from your field as a cost. (You can also detach an Xyz Material from an Xyz Monster that is face-down on your field.)
The effect "Reduce the Rank of the targeted monster by 1, and it loses 300 ATK" is applied as long as the targeted Xyz Monster remains face-up on the field.
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