Once per turn: You can target 1 "Scareclaw" monster or 1 "VisasStafrost" you control; this turn, it can attack while in face-up Defense Position. If it does, apply its ATK or DEF (whichever is higher) for damage calculation. When your opponent activates a card or effect while you control a "Scareclaw" monster in the Extra Monster Zone: You can send this face-up card from your Spell & Trap Zone to the GY; negate that effect. You can only use this effect of "Scareclaw Sclash" once per turn.