WARNING
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YARR FELLOW PIRATE!
This build is made for Co-op vs. AI. If you ARRRR willing to use it on normal games DO IT ON YOUR OWN RESPONSIBILITY!

GAME START
As it looks hard on the first look the thing is really easy to get. On the beggining start with Sapphire Crystal. Take also 2x Health Potions because you have cash for them.

EARLY GAME
On the first back try to take Avarice Blade and Boots. If you don't have enough money for them, the first item you need is Boots. Take second Avarice Blade and upgrade Boots to Berserker's Greaves. Then buy Sheen and Zeal after. Then go for more critical strike with Cloak of Agility. Build up your phantom dancer. Buy Vampiric Scepter.

MID GAME
Sell Avarice Blade and buy Cloak of Agility. Go for the whole Infinity Edge. Next thing you have to do is selling Avarice Blade and buying Zeal for more critical strike. Then build your Bloodthirster.

LATE GAME
You should be killing all the bots right now. Finish up your Phantom Dancer. It should be end of game, but if you still have cash and problem with bots buy Trinity Force. If you will bare to this spot sell Berserker's Greaves and buy Hextech Gunblade.

You want to smash your opponents skulls and grab some IP and XP from easy games to get 30th lvl and/or your favourite character fast? Then go for this crazy Pirate!

You want to start mid. Fight for your lane, mid is the position of the captain. AND GANKPLANK IS THE ONLY CAPTAIN HERE!

You will have to match with Ryze or Annie. Annie is easier in mine opinion. You got Sapphire Crystal to spam with Parrrley and Remove Scurvy. On the very beginning (3rd minute) try to kill your BOT. Shot him with Parrrley, hide in brush to lure him into it... it is up to you. JUST KILL HIM PIRATE!

Stay in your lane for as long as you can. When you will get to the Vampiric Scepter it is Mid-Game starting. Kill the whole jungle (i mean on the both sides of the river). Try to keep it dead, it's extra cash for you. Don't EVER go on solo ganking in mid-game. If you really want to kill someone - keep with your team and do following:

MID GAME FIGHTING!
1. Let your tank init the fight. If you don't have the tank go to the next point
2. Keep yourself and your team by the tower. Use your ulti there, it's really powerful.
3. Don't fight melee! Use your Raise Morale to make team hit harder and Parrrley.
4. If someone is running away - chase him. If they have any stun or slow in their team remember to use Remove Scurvy properly. It removes stuns, slows, taunts...
5. Remember to use your exhaust on Ashe or Warwick. They really have damage and can wipe the whole team.
6. Use your ignite on the end of the fight on anyone.

Mid-Game ends in the moment where you buy your Bloodthirster.

Late game. You only need to buy items to get even stronger. Huh. How to fight here? Take a slower/stunner with you... then try to catch bots while they are solo or with other one... then...

LATE GAME FIGHTING!
1. Take Bot ***
2. Smash him with Parrrley
3. Speed/dmg up with Raise Morale
4. Smash him more with your melee damage
5. Rob him from cash and put it into your TREASURE CHEST! ARR!
6. Lead your team to VICTARRY!

And by the way, those runes are lie, they are copied from other build ;)