Enchanted Sword Nothung





''Increase the ATK of the equipped monster by 400. As long as this card remains on the field, all face-up Dragon-Type monsters are removed from play.''

Rulings

 * This effect applies when this card is activated, and when your opponent attempts to summon a Dragon-Type Monster, working as a mandatory Trigger effect that is not optional. For example, should your opponent summon "Dark Armed Dragon", they will miss the timing as Northung would automatically activate (being continuous effect) and Dark Armed Dragon cannot chain.