I am creating this guide for Sivir as a complete joke and this is not intended to be taken seriously. Now onto the guide.

One day while i was messing around in LoL I had a thought: Sivir is widely considered as one of, if not the best, farmers in the game but what if you wanted to make her even better at clearing minion waves? The answer to this question, of course, is the often neglected and mocked Tiamat! Upon testing this guide it actually came out somewhat effective at more then just clearing minions as any enemy champions who were in the area of those minions were splashed with massive damage from attacking their weakpoints. Erm... or something along those lines. Because of the Tiamat's passives stacking if you were hitting a minion for 300 anyone close to that minion would be hit by 35% of the damage 4 TIMES. If you were to crit a minion for lets say OVER 900(0)! then enemies around the creep or champion that received the critical strike would take around 320 damage 4 TIMES that's around 1270 damage if my incredibly flawed math is correct(which it more then likely is not)after seeing the devastating power that this i immediately rushed over to Mobafire to write this guide.

EDIT 1

I knew I would forget to do something and what i forgot was kinda a big thing. Sivir's W, Ricochet, DOES NOT I REPEAT, DOES NOT apply on hit effects or procs so if you are expecting tiamat to do it's thing on all 5 of your ricochets it won't because that would be ridiculous.

Pros

great farmer
high damage output
better then average crit chance
alright sustainability

Cons

(And boy are there a lot of them)
VERY SQUISHY!
if enemies are stacking armor then your damage is reduced dramatically
attack speed is much less then other Sivir builds
and a few more that I cannot remember at this time.

My runes are just a mix-mash of all the runes that i had available in my inventory and are not the greatest set up for, well, anything really, but with the extra crit strike it gives you a higher chance to get some of the devastating crit splashes that I described in the introduction. Crit damage is also seem like a viable choice of runes for this guide but i did not have any to test out, and the extra 50% damage from the Infinity Edge seemed like enough to me. I took the mana glyphs for two reasons. The first being I didn't really have any other things to put there and because Sivir is infamous for her low mana pool. These runes are certainly not set in stone so try any combo that you think you may like.

The masteries are just the standard Ranged Carry set up with the slight change by taking 2 points inoffensive mastery because, at it's heart this is still a minion destruction and farming guide. The mana regeneration is also chosen because of Sivir's lack of mana control although with this build the Tiamats add quite a bit of extra health and mana regen.

The items are fairly simple and as i explained in the Intro to this guide it is all about stacking the Tiamats. I start out with aand ato help build the first Tiamat quicker and adding some more sustainability to keep you in the lane a little longer. Grabbing a health pot at the start is also a possibility and if you want to you can get one.(I do this sometimes it all depends on if I remember to buy the damn thing >.>) once you have enough gold purchase you firstTiamat and prepared to be yelled at by your team!(this doesn't always happen but it certainly can!) next start working towards yourGreaves. After this you need to start building up the driving force of all AD champs!The Infinity Edge! after you obtain this the build gets really easy, just buy moreTiamats! if you are facing an armor heavy team you may want to consider getting a Armor Penetration item such as anlast whisper or aGhostblade for more armor pen but a slight hit to damage. If the need arises and the enemy team starts getting armor items I highly recommend getting one of these items.

The skill sequence is fairly simple stick to the the skills that made Sivir such a great farmer in the first place and leveling your ultimate whenever you can. I level spell shield last because I don't use it much anyway. once again this is not set in stone and I invite you to level your skills anyway that you see fit.

I runandbecause these are the spells that i use most of the time on my ranged carries.

other summoner spells that i recommend for this guide are:for a longer lasting escape mechanic andfor another defense against Sivir's lack of mana although I don't think you you need it because of all the mana regen from the Tiamats

if you feel that there is a better combo of spells for this guide drop a comment and tell me!

In summary, BUILD TIAMATS AND AUTO ATTACK AND WIN.

umm... almost but not quite, once again I would like to state that this is a humorous guide that is not meant to be played in super try hard competitive mode unless you are looking for a laugh as your team rages. Ont he other hand this guide did actually kinda work for me in a few quick games with friends but it certainly has not been tested in ranked or in competitive games.

Laning

Ah, I almost forgot to bring this up, you have to be careful with which lane you chose because while you will dominate that lane in mid to late game if you get shut down early you will have a much harder time getting the items that are needed to make this build viable. I have only played mid a few times with this build and if you can handle yourself well whilst in a solo lane that is the preferred place to be but if you are unsure of your self make sure you are laning with someone who doesn't need tons of minion kills such as a support or a tank, because you will own any lane that you are in and get most last hits on minions. Thanks everyone for taking the time to read this guide and I accept and welcome any constructive criticism that you may have be sure to rate and comment for the minion dominating lulz that will in sue!