Weapon Change

 The knight in this card's artwork is also featured in the artwork of Birthright.

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This is a slower, more costly, but permanent version of Shield & Sword.

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This comparison may be further supported through this card's artwork as both cards feature a knight/warrior of some sort and as well as an artistic gestalt of a sword and a shield (ATK/DEF) taking each other's places.

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The Spanish name of this card has an errata, as it's printed as "Cámbio de Arma instead of Cambio de Arma".

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OCG Rulings

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This card's effect is no longer applied if it leaves the Field. At this time, recalculate the ATK/DEF.: Spell Card > Weapon Change

Paying 700 LP is a cost

Previously Official Rulings

"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 the Moving Fortress" into a 2200/800 monster, then use "Limiter Removal" to make it 4400/800, then destroy "Weapon Change", "Gear Golem the Moving Fortress" is 800/4400.