Effect
Once per turn, when the battle position of a Rock monster you control is changed: You can target 1 Spell/Trap your opponent controls; destroy that target.
This effect targets 1 Spell/Trap Card on your opponent's field.
If a Rock-Type monster's battle position is changed during the Damage Step, you cannot activate this effect.
If a card effect is activated as Chain 2 or higher, or if a Rock-Type monster's battle position is changed during the resolution of an effect, you cannot activate this effect.
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