Hi, I'm b3yond x godly, and this is my FIRST build, so go easy on me (:

Its a Tanky DPS, which works great! Sorry this isn't going to be a very detailed guide, HOWEVER!
the build, masteries, and runes work great and make you totally unstoppable!

DO TRY IT OUT BE4 U BASH! IT WILL SURPRISE YOU! KTHNXBYE!

Just the basic armor pen. for, well, armor penetration. xD
Flat armor seals for durability and survivability, cool-down reduction glyphs for quicker bursts, and finally armor pen. quintessence.

Don't really need to explain the masteries, but the 9 points into defence really helps keep you alive.

K so, now to the items!
This is how its gonna go:
vampiric septer >>> Boots of Lucidity >>> Sword of the Occult >>> Wriggle's Lantern >>> Phage >>> Madred's Razor >>> Frozen Mallet >>> Ghost Blade >>> Blood Razor


As you can see, i didn't include BT's into this build... this is because the items above make you tanky which is a very important part of Rivens build. Boots give you lower cooldown, sword becomes GODLY with stacks.. FAR better than a BT... lantern provides you with armor, lifesteal, and an unlimited ward (technically :P), Frozen Mallet gives u that boost in HP, once u have this item it will be very hard to kill you.. and also it slows enemys down quite a bit so u can land a few full bursts of combos. ghost blade for items damage, armor pen, and mainly, the cooldown.. and finally blood razor, which gives armor att speed, and damage.

getting a BT might make you stronger, however, you CANNOT compromise your survivability.

Well guys I really hope you all try this guide and completely destroy the other team with your burst damage as well as stay alive with ur amazing armor and health.