Hey everyone :) I was looking through guides for Teemo, and noticed that no one has written a guide focused on Teemo's Toxic Shot. It's such an underestimated skill, IMO. Please take note that this is my first ever guide on Mobafire. Before we go any further, I would like to make clear that I'm not saying "THIS IS THE ULTIMATE GUIDE FOR TEEMO, ALL THE OTHERS ARE BULLS**T", I just want to show people another way Teemo can be played, and how I enjoy playing him. Also, I'm writing this guide only for pubs, since I am only 20 lvl and have never played in ranked. So, without further ado, let's get going!

Pros:
- Great farming capability
- Perfect harasser
- Annoying :)
- Pretty tanky early and late game, if fed enough

Cons:
- Lacks Blinding Dart for burst dmg early on
I don't seem to find another con, so please mention anything in the comment section.

Greater Mark of Magic Penetration - Well, pretty self explanatory, just gives you some helpful mPen that is effective both early game and later on. Always makes your spells & Toxic Shot hurt! <3

Greater Seal of Health - Bonus early game survivability is always appreciated, isn't it? You could always swap this for Greater Seal of Evasion but I suppose that's mostly for later on. Another viable option is getting Greater Seal of Replenishment/ Greater Seal of Scaling Mana Regeneration, even though these are also for late game, where you'll be spamming Blinding Dart.

Greater Glyph of Ability Power - Gives you the extra AP you need early game to make that Toxic Shot a pretty imba DoT and your Blinding Dart pretty powerful, even on level 1. Another choice would be Greater Glyph of Cooldown Reduction, if you are more of a spammer. NOTE: This type of runes helps only with BD, so I would suggest buying Potency ones.

Greater Quintessence of Ability Power - Combined with the glyphs, 2 of these give you almost 20 AP to start off with! What else can you ask for?

Greater Quintessence of Health I got one of these, just to reach that 90 hp mark combined with the seals. If you feel like you're tanky enough, you can swap this with a third Greater Quintessence of Ability Power. On the other hand, if you think you're still too squishy, you can swap one or two of the above for another Greater Quintessence of Health.

NOTE: I don't know if Greater Seal of Replenishment would be something Teemo would need in this guide, since we won't be using Blinding Dart that often. If you find yourself running out of mana more easily, feel free to get some of these.

Flash - A pretty damn versatile summoner spell. You could catch up to that enemy running with 10 hp when your Move Quick doesn't help, escape from a sticky situation with that tad bit of health by blinking away or over a wall, this spell has like a billion uses! Not much else to talk about here.

Teleport This is just a personal choice. I always need to have TP with me if I'm playing on 5v5. You can help you team defend or push in just a moment, you can TP to farm that HUGE creep wave coming for your tower with your ult, and many more.

Another viable choice would be Exhaust, to stop the enemy that is chasing you, or help with chasing someone early on.

If you are willing to sacrifice a mastery point from the offensive tree to get Burning Embers, Ignite is a viable summoner spell to pick for some lethal DoT combined with your Toxic Shot and a nice AP bonus while it is on cooldown.

You can always alter the summoner spells the way you like, but these are the ones I believe you should avoid:

Clairvoyance - No. Just no. You've got your shrooms for this job, and they're even better!

Smite You're not a jungler in this guide, and this loses power later on anyways.

Clarity You won't be spamming Blinding Dart that often, and even if you do, some mReg seals should do the trick.

Fortify Let your support or someone else who doesn't need summoner spells get this. Nuff said.

Revive No. Again. Early on, the death timer isn't that long, and later on you will be probably be able to escape with just that 50 hp. And while this is on cd, (a loooooong time) you will be left with just one summoner spell.

This mastery tree might seem weird, since there is no 21/0/9 or something, but I have some pretty good reasons for this. Teemo isn't so dependent on mastery spells, even though they do help him. That's why we don't need Prescence of the Master. Also, that 5% from Havoc isn't that much, IMO. You can try it, if you want to. You could also go for Ardor in the defensive tree, I don't really know. What we need for this build is mPen, AS, AP and some CDR for later on. These we get from the offensive tree. From the utility tree we get some other nice boosts for everything.

NOTE: You could always try to go 21/0/9 or 9/0/21 or something, I didn't say that you mustn't. As I said before, I'm just expressing my opinion.

Early Game

Start off with a Doran's Ring for that extra hp and AP. Another choice could be Doran's Blade or Dagger if you want more dmg or AS respectively. If you choose to buy Dagger you should get that Health Potion, since you'll be squishier and you will, most of the times, need it. Another choice would be to start with Boots and 3 Health Potion.
I chose Berserker's Greaves because they give you a nice AS bonus and help with harassing early game. A lot. You can opt for Sorcerer's Boots if you don't have the mPen runes or you just want more mPen. Also, Mercury's Treads might actually work better against a team full of CC.

Mid Game

Malady The earlier you buy this, the better. You could also try getting just Boots and immediately going for this, even though I wouldn't suggest it. This item synergises sooooo well with Toxic Shot. <3
Nashor's Tooth You should start by getting an Amplifying Tome and then going for Stinger for that extra AS. After that, finish your Fiendish Codex. This item is just soooo awesome. It gives you everything you need: CDR, AS, AP and some mReg. What else do you need?

Late Game

Rylai's Crystal Scepter After getting everything else all you need now is more tankiness and AP. This items gives you both, plus a nice slow on your Blinding Dart. This is perfect for late game.
Rabadon's Deathcap Gives you a BUTTLOAD of AP. Nuff said.

Viable Items

Doran's Ring You may be saying, "another Doran's?" Well yes. If you happen to have problems early game you could purchase this. Cheap health, MP/5 and AP. Pretty damn good for 475 gold. Definately worth to buy.
Guinsoo's Rageblade This item would be really great on Teemo if you could manage to get it after Nashor's Tooth. Bonus AP and AS on hit? Who doesn't want this?
Abyssal Mask A nice mPen boost for everyone in your team. Pretty nice AP and mRes, too.
Madred's Bloodrazor If the game is still going after the 45/50 min mark, you should consider buying this. With your beastly AS + your Toxic Shot you could make even tanks go "Poof!" in a matter of seconds.
Rod of Ages If you need more health, this is the item to buy. Gives you a nice 450 hp plus a bonus every min.

Optional Items

Moonflair Spellblade I haven't looked into this item a lot, tbh, but I suppose it could work against a team full of CC if you decided not to buy Mercury's Treads.
Quicksilver Sash Ah, the good ol' QSS. Even though I don't find myself buying this often, it can be bought against a team with many spellcasters.
Void Staff If your enemies are stacking mRes you should consider buying this later on. It gives you a LOT of mPen plus an awesome AP boost.
Mejai's Soulstealer If your enemies are stupid enough so to not focus you and you are getting pretty fed on kills, this is the perfect item to buy.
Frozen Mallet If your enemies happen to be faster than you, even with Move Quick, or you think you are too squishy, this is a pretty nice item to buy later on. Damage, a lot health for survivability, and a sure on-hit slow! I'm thinking about adding this on the normal build, and not just in the optional items....

Toxic Shot Your free Bloodrazor! And some more. We max this first, because it hurts a lot early game. This is your main harassing and damage dealing tool. Fact: This actually gains +0.7 dmg per AP. +0.14 on hit and +0.14 per second for 4 seconds (0.14 * 4) :) That's why this skill is sooooo awesome!!
Blinding Dart The one point we put in this early game is for some extra harassment and annoying that enemy melee DPS trying to hit you, while you own his/her face with Toxic Shot. You can also use this for ksing if the game gets too boring (remember, this is a guide for pubs) and deal huge amounts of burst damage later on.
Move Quick We put one point in this early mostly for it's active, just to make sure we can escape any incoming ganks. Later on, you just outrun everything, and with Rylai's, no one will be able to escape you.
Noxious Trap Well, the usage of this skill is explained on every Teemo guide. Place the shrooms on important places of the map, to block escape routes, in bushes. This skill does everything.

Blinding Dart

Early Game

Use this with Toxic Shot for huge harassment. If the enemy is coming for you, use BD first, followed by a couple of hits. If the enemy sees that you're coming and is backing, hit him/her once or twice, followed up by a BD.

Mid - Late Game

Just throw this whenever you have the chance, it will deal loads of damage.
Move Quick Nothing to explain here, just use it when you need it for any reason. It's manacost is too low to affect you.
Toxic Shot Pretty much the same strat as with BD. Use this to harass and last hit creeps with the bonus on-hit damage.
Noxious Trap Well, whether you have played Teemo or not, you should know that these shrooms do just about everything.

I hope you guys find this guide helpful. I just wanted to make a Teemo guide with a different play style. Please, leave me any supportive feedback in the comments, and if you vote, tell me why you voted up/down. If you have any tips on how to improving this guide or some suggestions, please put them in the comments, too.