I have seen many Twisted Fates build in AD/AS way and I think they don't affect on game as much as AP Twisted Fate. This guide is based on high burst damage and max cooldown reduction.

Pros:
- very good harras abilities
- extreme push and tower takedown
- combo/burst damage
- can easily kill single target
- very good range
- zone control abilities
- global teleport
- very good ganking abilities
- super backdoorer
- can easily have 40% CDR
- he's a fuc*ing magician throwing magic cards!

Cons:
- very squishy
- when focused on teamfight or left by his teammates can die very easy
- not expierienced players can have problems in picking a card correctly
- he's only defense is good positioning
- low movement speed

I use standard masteries for mage 9/0/21 with improved flash and teleport. The most important thing in these masteries are CDR Sorcery and Inteligence.

Magic Penetration Marks
Maga Regen per level Seals
Ability Power per level Glyphs
Cooldown Reduction per level Glyph
Health Quints

What is interesting and you may ask for, I chose 8 Glyphs for AP/lvl and 1 CDR/lvl. Why? Because of that you can get 40% CDR with only one item, which I will explain later.

Teleport is a great spell when you have to go to base (buy items, low health) and then quickly return on your lane. Of course, you can use your Destiny, but i think it is a waste of your ultimate. Also you can use this spell to push top/bot lane and quickly escape (I will explain it later)

Flash is a efficient way of running and escaping ganks. It saved my life many times. I think it is better than Ghost, because you are out of enemy range very quickly. Also, it is useful in jungle teamfights, when you have to teleport through walls to escape.

Another good spells:
- Ignite. It's a good way of doing additional damage to your enemy, but in late game this spell is useless.

- Cleanse. You can use this spell, when you are disabled and escape more easily with your Destiny.

Wild Cards - Twisted Fate throws three cards, dealing damage to each enemy unit they pass through.
Throws three cards which deal 60/110/160/210/260 (+0.65) magic damage to each enemy unit they pass through.
Cost: 60/70/80/90/100 Mana
Comment: This is your basic tool of harras enemies. You have to aim correctly or predict your opponents moves to hit him. When you throw them correctly you can kill entire wave of minions in one shot. They have extreme range so you can harras enemies under turret and keep them at distance.

Pick A Card - Twisted Fate chooses a magic card from his deck, and uses that for his next attack, causing bonus effects.
Cast once to shuffle the deck and again to choose your card, enhancing your next attack.
Blue Card deals 40/60/80/100/120 (+0.4) bonus magic damage and restores the bonus damage in mana to Twisted Fate.
Comment: Blue Card is your best way of replenishing mana and taking down the turrets. When laning use it to last hit minions.
Red Card deals 40/60/80/100/120 (0.4+) bonus magic damage to units around the target and slows their movement speed by 30/35/40/45/50%.
Comment: This card has the biggest damage of all your cards. Also it does AOE dmg and AOE slows. Use it to kill whose bunch of minions and do very high dmg to your enemies. It is most effective card to use in teamfights.
Gold Card deals half the bonus magic damage of Red and Blue Cards (+0.4) and stuns for 1/1.25/1.5/1.75/2 seconds.
Comment: Use this card to stop fleeing enemies, stop dangerous dps like Yi, stun enemy chasing you and stop some enemy ults. Always pick it before using your ultimate (I will explain it later).
Cost: 40/55/70/85/100 Mana
REMEMBER! The cycle of cards are always BLUE -> RED -> GOLD starting from random one. Don't hurry in picking a card. You can repeat the cycle to pick a card correctly.

Stacked Deck - Every 4 attacks, Twisted Fate deals bonus damage. In addition, his attack speed is increased and his cooldowns are decreased.
Passive: Every 4 attacks, Twisted Fate deals an additional 55/80/105/130/155 (+0.4) magic damage.
In addition, his attack speed is increased by 3/6/9/12/15% and his cooldowns are decreased by 3/6/9/12/15%.
Comment: Prepare your passive before attack. Combined with Lich Bane passive and red card it makes the biggest amount of damage you can do in one shot. The 15% of CDR is great, because you can easily get 40% CDR.

Ultimate: Destiny - Twisted Fate predicts the fortunes of his foes, revealing all enemy champions and enabling the use of Gate.
Reveals all enemy champions (including stealthed champions) for 6/6/6 seconds.
While Destiny is active, Twisted Fate can teleport anywhere on the map.
Cost: 150/125/100 Mana
Comment: This is a very interesting ultimate. In good hands it can be very deadly and enemies should fear you. Firstly, you can reveal all enemies (including stealhed one's like Twitch or Evellyn). It has many more applications which I will explain later. Then you can teleport anywhere on the map! Isn't great?! You can be everywhere and it gets great pushing opportunities.

Passive: Second Sight - Twisted Fate and his allies receive an additional 2 gold per kill.
Comment: Everyone likes additional gold, right?

Core:


I start withDoran's Ring, which gives me 100HP (which is very helpful at beginning because TF is very squishy), 15AP and 4 mana regen per 5 sec. It's a great starting item, because it gives you more survivality early game.

Then I'm trying to get 2135 gold and getIonian Boots of Lucidity andMejai's Soulstealer on one shot. If not, I getBoots of Speed andAmplifying Tome.

After getting Mejai's and 1260 goldSheen, you can start teleporting to top/bot lane and trying to get kills/assists. When you have wholeLich Bane you are becoming a real threat to your enemies (Stacked Deck passive, red card and Lich Bane passive combo).

When I have 1600 gold I go to base to getNeedlessly Large Rod and then (1700g)Rabadon's Deathcap and start to rock! Then you will have about 400-500 or more AP (depending on Mejai's stacks).

Then you have got some options depending what team you are facing.
Rylai's Crystal Scepter - The coolest thing about Rylai's is that you get 500HP which makes you about 2400HP champ. Also you get slow, which combined with Red Card slow is very good.
Zhonya's Hourglass - I pick it up, because of old Zhonya's Ring active. It can save your life, when you have flashing red light above your head (Karthus' ult) or your stun is on cooldown and you have no way to escape. Also it gives you even more AP and 50 armor, what can be useful against DPS enemies.
Abyssal Scepter - When you are facing heavy magic resistant team or heavy caster team, pick it up. You can be more deadly and more secure at ones.
Void Staff - Again. High magic resistant team and when you don't have Sorcerer's Shoes it can become kinda' handy.

1. Solo on mid.
In early game last hit minions with Blue Card and try to harras your enemy with Wild Cards. Use Wild Cards to damage whole wave of minions coming in stright lane. When you push your enemy to his turret pick blue card and hit turret, then make few steps back. Watch out when enemies are missing, because they may be trying to gank you.

2. Teamfight
Always try to be at back of your team's fighting. Pick a Gold Card and stun your and teams target, then throw Wild Cards and hit ones with autoattack. In late game this should be enough to takedown enemy. If you are not fed enough make few steps back and wait your cards (cooldown 3sec), then strike again. In teamfights beware of heavy DPS characters like Yi or Xin, because without any help they can take you down very quickly. When you oponents are fleeing in one group use your Red Card to slow them all. Also the one hitted with Red should be dead by now :)

3. Using your ultimate
You can use your Destiny in many situations:
- When your team in fighting and you are far from battle
- To assassinate enemy (after teamfight, when you saw someone fleeing with low HP, or to takedown enemy jungler)
- To reveal enemy team (ganking, doing Baron etc)
- To teleport from one lane to another to push minion waves

When going into teamfight or assassination ALWAYS before using your ult pick a Gold Card. It is necessary to kill an enemy. So, pick a Gold Card, reveal oponents, teleport BEHIND your enemy, stun him, use Wild Cards and autoattack. And that's it, enemy should be dead.

When playing Twisted Fate you can get 40% of cooldown reduction very quick, easy and by many ways. The simplest is to buy Ionian Boots of Lucidity (15%), max your Stacked Deck passive (15%), from Sorcery and Inteligence masteries you get 9% and from only one Glyph you get 1%. On 18lvl you have 40% CDR with only ONE item! Isn't it maaaad?! You have 40% even without maxed Mejai's (15%), Blue Golem buff (~23%) and Elixir of Briliance (10%).

When you have both teleports ready (Teleport and Destiny) and friendly minions are coming to enemy turret and enemies are NOT missing Teleport to minion. Takedown turret with your Blue Card. If some enemies missed by the time use your Destiny to reveal their position. If they are coming for you just teleport to save place or to the oposite lane (if it is clear) and try to push to the next turret. WARNING! Now you don't have teleport to escape, so watch out and predict enemy moves and use Recall when you are not feeling save.

3 gold rules when playing as Twisted Fate: HARRAS, PUSH, ASSASSINATE.

With this build I've reached 928 AP with all buffs.Twisted Fate is very fun to play character. If played wisely you can set the game how you want it to be set.
That's my first guide. Sorry for all mistakes made by my sometimes bad english ;) I hope you will rate and comment. And always remember to justify your opinion. It will really help me to improve this guide.

May the luck be on your side :)