Well what else does Wrathion know very well? Well of course, legendary cloaks. And Wrathion is going to work with us to create a Legendary cloak that will initially provide some sort of defense, some sort of shield against N'zoth's sanity draining attacks. This will enable us to venture deeper and deeper into these visions on our successive visits earning greater rewards and also unlocking more of the mysteries behind N'zoth's power. This cloak may also come in handy when you face off against N'zoth himself further down the road.