This is my first build (so be gentle) of many I plan on creating. As I receive feedback on this build as well as personal experience with the champion, I will tweak the build until it is in my eyes, complete. Be sure to check back at a later times to see if any edits have happened with the build. There is a change log at the bottom of this guide if you wish to know all the changes that are happening.

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Twitch is attributed as a stealth / range / carry unit. I have often thought of Twitch also as an assassin simply because he can do insane Damage Per Second. Twitch is typically strong at the start, weak towards the middle, and excellent towards the end but this is considered typical behavior of a carry unit.

In many players eyes Twitch is a force to be reckoned with. Twitch has a reputation for being one of the most irritating champions to have to verse simply because of his ability to out power many situations.

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Pros +High DPS +Excellent Ambusher/Ganker +Excellent Combos +Among the Highest Attack Speed +Great Team Champion +Has A Crossbow

*****

Expunge

*****

Cons -Weak At The Start -Has Little Defence -Easy To Counter Twitch Via Sight Ward -Terrible Jungler -Can Be Difficult To Use Twitch -Smells Like A Foot

Greater Quintessence of Critical Damage x3: I focus on twitch's critical strike damage as one of his attributes. This quintessence allows for greater critical damage allowing for stronger critical hits.


Greater Mark of Critical Chance x4: I focus on twitch's critical strike chance as one of his attributes as well. This mark gives twitch more of a critical chance increasing the amount of critical he performs per x amount of attacks.


Greater Mark of Critical Damage x5: I focus on twitch's critical strike damage as one of his attributes. This mark gives twitch increase critical damage allowing for higher critical to be hit.


Greater Glyph of Critical Chance x4: I focus on twitch's critical strike chance as one of his attributes as well. This glyph gives twitch more of a critical chance increasing the amount of critical he performs per x amount of attacks.


Greater Glyph of Critical Damage x5: I focus on twitch's critical strike damage as one of his attributes. This glyph gives twitch increase critical damage allowing for higher critical to be hit.


Greater Seal of Critical Chance x4: I focus on twitch's critical strike chance as one of his attributes as well. This glyph gives twitch more of a critical chance increasing the amount of critical he performs per x amount of attacks.


Greater Seal of Critical Damage x5: I focus on twitch's critical strike damage as one of his attributes. This glyph gives twitch increase critical damage allowing for higher critical to be hit.


I know this rune build can seem a bit redundant however I assure you this is one of the best ways to build twitches runes (of course in my opinion) for the build that has been provided.

Heal
Heals Self and Allied Champions
(Recommended) I suggest the spell Heal simply because because of Twitch's squishy nature. Having an immediate form of health regeneration (other than potions) can be extremely useful in many different situations.
Flash
Teleports Self A Set Distance
(Recommended) Flash is a good spell for Twitch especially considering how squishy he is. Flash grants you the ability to teleport through some walls (excellent escape routes), teleport away from the enemy if you are weak, or even teleport towards the enemy if they are getting away.
Surge
Increases Attack Speed and Ability Power
Some people prefer to use Surge instead of Heal. Twitch has an incredible damage per second ratio allowing him to get the job done fast. Surge increases his already high attack rate making him more lethal. Surge is often used by players that like to perform stealth ganks.
Revive
Immediately Revives Your Champion At The Summoner Platform
Revive is a great skill especially for unique situations (I.E. Enemy champs are about to destroy an inhibitor and your dead). From a personal standpoint, I don't like the skill however it does not conflict with Twitch's style of gameplay.

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Exhaust
Exhaust Target Champion
Exhaust's primary use is to slow enemy movement. Well Twitch has the skill Venom Cask which slows enemy movement as well. Logically speaking, Exhaust has no real use with Twitch and therefor I deem a Non-Viable Summoner Spell.
Ghost
Movement Speed Increases and Ignore Unit Collision
Ghost's primary function is to allow a champion to escape from a bad situation. It does so by increasing the champions movement speed and allows them to ignore unit collision. This skill can be benifitial in certain situations. However Twitch has the skill Ambush allowing him to go invisible rather fast. This makes the need for an escape spell minimal and therefor I deem this summoner skill a Non-Viable Summoner Spell.
Ignite
Deals True Damage Based On Level
Ignite is a skill for champions that don't always have the ability to make the fatal move. This summoner skill allows those type of champions to perform that fatal blow needed for a kill. Twitch however has a passive called Deadly Venom that deals damage over time. This makes getting the fatal blow relativity simple as the passive does a lot of damage. Due to Twitch's passive, I see no use for Ignite and therefor I deem the skill as a Non-Viable Summoner Spell.

The other remaining summoner spells ( Clairvoyance, Promote, Clarity, Teleport, and Cleanse) neither help nor conflict with Twitch's playing style. These skills can be used but are not suggested as they are not part of the dynamic that is Twitch.

Deadly Venom
Stacks poison up too six times and lasts for up to six seconds
Twitch's attacks infect the target with Deadly Venom, which deals damage each second, stacks up to 6 times, and lasts up to 6 seconds.
Ambush
Twitch hides in the shadows, waiting for a nearby enemy. If he attacks, he will gain bonus attack speed.
After 1.25 seconds, Twitch becomes stealthed for 10/20/30/40/50 seconds. If Twitch attacks a unit while Stealthed, he gains 30/40/50/60/70% attack speed for up to 10 seconds, depending on how long he was stealthed before attacking. Cost - 60 Mana | Range - 20
Debilitating Poison
Infects all nearby champions with Debilitating Poison, slowing their movement speed.
Slows nearby enemy champions' move speed by 30%, plus 6% per Deadly Venom they have. 2/2.6/3.2/3.8/4.4 second duration. Cost - 80 Mana | Range - 1200
ExpungeExpunge
All nearby enemies secrete Twitch's toxic venoms from their bodies, dealing damage for each stack.
Deals 30/60/90/120/150 (+1) magic damage to each nearby poisoned enemy, plus 20/30/40/50/60 additional damage per stack of Deadly Venom applied to them. Cost - 90 Mana | Range - 1200
Spray and Pray
Twitch closes his eyes and fires his crossbow, spraying powerful piercing arrows ahead of him.
Twitch's attacks become long range, passing through units, and he gains 15/25/35 Attack Damage. Lasts 12 seconds or 5/6/7 attacks. Cost - 150 Mana | Range - 1200

Ive selected these Items simply because I feel like they support the type of Twitch we are trying to build. The items above give us the Attack Speed, Life Steal, Mana, Health, Defense, and Attack Strength Twitch needs in order to do maximum damage and stay in the fight longer.

Twitch is not a good jungler until later levels. It is recommended you farm a lane's minions while keeping a healthy distance between you and the enemy champions. If you really want to jungle, you can add about 3 health potions to the champions item build and start jungling at about level 6 - 8.



In a team fight, Twitch typically plays the role of ganker or ranged attacker. Let me describe what I mean in more detail. Twitch can gank because he has the ability to go into stealth mode. This allows him to sneak right through the enemy and attack them on their escape route. Twitch can also be a ranged attacker by using his ultimate Spray and Pray. This allows Twitch to add stacks of poison to the enemy champions while maintaining a reasonable distance so you do not become the victim.

The city-state of Zaun is a twisted realm of science, mercantilism, and magic run amok. While the young science of techmaturgy does much to advance civilization, its research and use in Zaun pushes the boundaries of morality on a daily basis. Zaun, choked with pollution from the countless factories and laboratories that spew waste into the environment, suffers greatly. As polluted as Zaun is above-ground, its subterranean levels are far worse. All of Zaun's runoff waste pooled together in its sewers, mixing into a toxic and mysterious concoction. A single plague rat rose from this alchemical nightmare - Twitch. Unlike his lesser evolved cousins, Twitch became as sentient as anyone else... provided they were as insane as he. A seeming byproduct of the evolutionary brew that spawned him was maniacal insanity, albeit in a functional form.

Twitch came to the League of Legends to represent himself ''as the only one of his kind'' on the Fields of Justice. Since then, he has found a generous benefactor in the city that gave him his evolutionary sentience - Zaun. Twitch is one of Zaun's premier champions in the League, and as such he fights for Zaun when political disputes between Valoran's city-states arise. Twitch has publically stated that his goal is to gain enough influence and materiel from his work in the League to try to recreate the process by which he gained his sentience. While many challenges lie ahead in his quest - one of the largest being his own insanity - were he to succeed, it would mean a bold and brazen step forward in the evolution of all of Runeterra. Zaun has pledged its support for Twitch in his quest, though it remains to be seen what Zaun's ulterior motives are in the matter.

''The existence of Twitch proves that anything is possible on Runeterra.''
-- Heimerdinger

I hope you all enjoyed my full guide on how to build / use / play / understand Twitch and reasoning for why I build him the way I do. Feel free to leave feedback by commenting below as feedback is the only way one can improve on what they are doing wrong. Thanks for reading!

12/07/2011:

1) Re-worked mastery explanations and added a tier by tier mastery breakdown.
2) Re-Fixed the item build (Catalyst now builds into another item)

12/03/2011:

1) Fix the item build.
2) Added new item "Sword of the Divine".
3) Changed the order of purchase for the items.

12/02/2011:

1) Tweeked the Pros/Cons.
2) Edited the guide.

11/30/2011:

1) Changed Summoners Skill Selections.
2) Reformatted The Summoner's Skill Selection Paragraph.
3) Tweaked The Item Build.
4) Changed The Rune Suggestions.
5) Edited The Pros / Cons.

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This is a list of items I want to incorporate into the this full twitch guide.

1) Create a situational items block.
2) Populate the FAQ
3) Create a linked table of contents for faster navigation.

If anyone has ideas for additions, please comment on the guide below.

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Nothing has been asked yet. When I start recieving questions about twitch or this build, I shall respond to them here.

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Thanks to jhoijhoi for the templates used in this champion guide, which you can find here.

Thanks to abzilla for providing me with information that allowed me to reformat this build the way it is now.

Thanks to HTC-Clan and all of its members that helped me build this guide. Visit them by clicking here.