Equip only to a Normal Summoned/Set monster you control. It is unaffected by your opponent's activated effects of Special Summoned monsters. During damage calculation, if the equipped monster battles an opponent's Special Summoned monster: That opponent's monster loses ATK/DEF equal to the equipped monster's original ATK, during that damage calculation only.
![Mordschlag [MP20-EN081] Common](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/1eb3556f-3b89-5f0a-abb8-9dd3fb04bc47.png?v=1698530641&width=1445)