Forum:Imperial Iron Wall Q.

If an effect that says "remove from play *What ever the cost is* to *Do this...*" while "Imperial Iron Wall" is active on the field, can you still apply that card's effect even though you couldn't remove it from play? For example, when I activate "Divine Sword - Phoenix Blade"'s effect to remove from play 2 Warrior-Type monsters in my Graveyard, but I am unable to do so because there is a face-up "Imperial Iron Wall", can I still add it to my hand? If this is a "no" answer, then why, on the Quillbolt Loop page can you still tribute a "Quillbolt Hedgehog" if it can't be removed from play because of "Imperial Iron Wall"'s effect?