Red Dragon Archfiend/Assault Mode

[ Dragon / Effect ] Cannot be Normal Summoned/Set. Must be Special Summoned with "Assault Mode Activate". After damage calculation, if this card attacked: Destroy all other monsters on the field. When this card on the field is destroyed: You can target 1 "Red Dragon Archfiend" in your GY; Special Summon that target. ATK/ 3500 DEF/ 2500