User blog comment:Tachikaze Master/So I noticed something.../@comment-24965906-20150407133947/@comment-24965906-20150407144211

Ragnarok does not stop indestructible items like Durandal or Goldritter. :/ Or Dragon Throne, as it only specifies the effects of monsters as those who are negated.

And if your opponent uses cards like Dragon Barrier, then the chosen monster survives. As it is not their effect that protects, but of another card type.