Dota 2/Lyralei the Windranger

""I once shot an ant off a worm's backside, but only aimed to wound.""

Windrunner is a ranged intelligence hero who is usually played as a support or a semi-carry. Her namesake, Windrun, gives her incredible survivability. Her Powershot is strong and reliable, letting her do damage to enemies in a line and sometimes snipe heroes down. A well-positioned Shackleshot can be very powerful if she catches multiple heroes with it. With Focus Fire, she can overwhelm heroes and towers with a huge burst of attacks.

Shackleshot
Shackleshot sends out an arrow which will do a mere mini-stun and no damage to the target if there's nothing behind it. However, if the targeted unit has a tree or another hostile unit behind it, it will bound the two objects together, stunning any enemy unit including the target tied by it. It can be a bit difficult to land, but if you do land a full shackleshot, especially on 2 enemy heroes, then your team has an all but guaranteed kill.
 * Ability: Target Unit
 * Affects: Enemy Heroes
 * Shackle Duration: 1.5 / 2.25 / 3 / 3.75
 * Mana Cost: 90 / 100 / 110 / 120
 * Cooldown: 12

Powershot
Powershot has a 1-second channeling time, after which you will launch a powerful arrow in the direction of the targeted area, hitting enemies in its path and destroying trees. Every time it passes through a target its damage will be reduced by 10%. The arrow is still released of manually canceled before it finishes channeling, though the damage is lesser. This spell is a very effective damaging skillshot, being able to wound mulitple heroes in one shot. It is also useful for scouting, since it grants vision around it. You can even use to snipe down enemies in the trees or in the fog-of-war.
 * Ability: Channeled, Target Point
 * Damage Type: Magical
 * Damage: 120 / 200 / 280 / 360
 * Range: 1825
 * Mana Cost: 90 / 100 / 110 / 120
 * Cooldown: 9

Windrun
Windrun gives you increased move speed as well as 100% evasion against physical attacks while slowing the movement of nearby enemies. This is why Windrunner is considered one of the most-survivable intelligence heroes in the game. The speed boost and evasion can let her get away from a dangerous situation. the speed bonus is also useful for positioning yourself to land an effective Shackleshot or Powershot.
 * Ability: No Target
 * Move Speed Bonus: 50%
 * Enemy Slow: 8% / 16% / 24% / 36%
 * Duration: 2.75 / 3.5 / 4.25 / 5
 * Mana Cost: 100
 * Cooldown: 15

Focus Fire
Focus Fire gives you maximum attack speed on the targeted enemy unit or building for 20 seconds, though your damage will be reduced, including the effects from Unique Attack Modifiers and items. The speed will be lost when you switch targets. This ability isn't used very often, since Windrunner is more of a spellcaster than a dps dealer. It is a useful spell for pushing down towers, and is often used for that purpose.
 * Ability: Target Unit
 * Affects: Enemies
 * Damage Reduction: 50% / 40% / 30%
 * Mana Cost: 200 / 300 / 400
 * Cooldown: 60
 * Scepter Cooldown: 15

Aghanim's Scepter can be bought by Windrunner and will decrease Focus Fire's cooldown and removes the damage reduction for unique attack modifiers and items.

Suggested Skill Build
Windrunner's versatility means that there are quite a few ways to skill her abilities. The most common one is for when she plays a solo short/suicide lane role, which is why she is commonly picked.

Solo suicide lane build
Always get Windrun at level 1 so you are able to survive the suicide lane and escape from enemy ganks. Then, proceed to max out Powershot and Shackleshot, but focus a bit more on Powershot for its harassment, pushing power and the ability to destroy trees. Shackleshot is to be maxed second, then max Windrun last. Focus Fire should be skipped until level 10 or later because it doesn't fit Windrunner's playstyle and doesn't becomes useful until later in the game.

Suggested Item Build
As Windrunner often plays the solo short lane role, it can be a bit difficult to get gold without placing oneself in danger.

Starting items
When starting out, get some consumables, Iron Branches and maybe some Mantles of Intelligence. Get a courier or wards if you're one of the supports.

Early-game items
Go for a Magic Stick into a Magic Wand for counter-ganks, a Boots of Speed for your eventual boot upgrade. Try to go for a Mekansm or your boot upgrade during this stage of the game. You might also want to pick up a Ring of Basilius for early pushes, mana regeneration and armor.

Mid-game/Core items
A Mekansm is a cost-efficient and highly effective item if you're a support, useful during pushes and teamfights. A Force Staff is also a good item that helps you position yourself for your spells, gives you an additional escape mechanism and grants you a nice bonus in your intelligence.

Phase Boots are the most common choice for Windrunners as it is cheaper than others, gives you better mobility, damage and help you position your Shackleshots and Powershots. Tranquil Boots is a cheaper upgrade that can be dissasembled to build a Mekansm later on. Arcane Boots are also a viable choice if you really need more mana regen and Power Treads give you versatility and a slight increase in survivability.

Luxury/Situational items
An Orchid Malevolence or a Scythe of Vyse give you great disables as well as granting you lots of mana regeneration, as long as you can afford it. An Eul's Scepter is a cheaper choice that also gives you more movement speed. A Linken's Sphere is another great luxury item, as its Spell Block combined with the evasion from your Windrun will let you shake off a lot of damage.

Getting an Aghanim's Scepter is not recommended on Windrunner unless you get a Unique Attack Modifier. If you manage to get enough gold to get items that grant Unique Attack Modifiers such as a Helm of the Dominator, a Maelstrom or even a Desolator, you might consider going for it. Having an upgraded Focus Fire along with a Unique Attack Modifier will give you enough damage to contest carries.