Use jhoijhoi's "How to make a guide" to learn how to BBCode. Clarity is not really useful on Nautilus, better to use it for some other spell to help your team, such as exhaust.

too text based
title boring
grammar is bad
Fix these points and I might give you a +1

Instead of randuin and sunfire---> Frozen Heart and Warmog, trust me, better benefits from it :) + u will help ur team mates all the time because of Frozen, Maw is a pretty good choice since m.ress + shield + passive :) +1

Things that you need to work on before I will +1: (A) Add detail and BB Coding. If you want to make the guide look more attractive go up to the tab that says Guides & Strategy, then go to Getting a Guide started. That will direct you to a guide on making a guide. (B) In LoL the skill sequencing system allows you to max a spell fully by level 9, but no earlier. Therefore, you need to take a point in Riptide at level 8, and a point in Titan's Wrath at levgel 9. (C) The Maw at the end of your build is pointless, if you want to get any offensive items consider a Rabadon's Deathcap + Lich Bane it does pretty well on Naut

Dude. Don't just copy paste from the LoL website.