Once during each of your Standby Phases: You can pay 700 Life Points, then target 1 Warrior or Machine-Type monster you control; switch the current ATK and DEF of that target until the end of your opponent's next turn.
Rulings
Individual Card FAQs
"Weapon Change" applies to the current ATK & DEF.
"Weapon Change"'s effect targets 1 monster. You select the monster when you activate "Weapon Change"'s effect.
If you use "Weapon Change"'s effect on "Freed the Matchless General", "Weapon Change" is destroyed.
Even if the selected monster's Type is changed by "DNA Surgery", the monster receives the effect of "Weapon Change".
If "Weapon Change" is removed from the field by "Giant Trunade" or "Emergency Provisions", "Weapon Change"'s effect is not applied.
If "Imperial Order" is activated after "Weapon Change", "Weapon Change"'s effect is negated, but if "Imperial Order" is destroyed, then "Weapon Change"'s effect is re-applied.
If you switch a monster's ATK/DEF with "Weapon Change", and then apply a new modifier, apply it to the switched ATK/DEF. Then, after "Weapon Change"'s effect ceases, re-apply the modifier to the reverted ATK/DEF once again.
If you use "Weapon Change" to make "Gear Golem" into a 2200/800 monster, then use "Limiter Removal" to make it 4400/800, then destroy "Weapon Change", "Gear Golem" is 800/4400.
Spell|
Continuous