Lich Build
Skills
1.) Sacrifice
2.) Frostblast
3.) Sacrifice (or you can switch lvl 2 and 3 skill around)
4.) Frostblast
5.) Sacrifice
6.) Ultimate
7.) Frostblast
After this upgrade Ice Armor, Frost Blast the next time it's available and your ultimate at levels 11 and 16. The last Sacrifice upgrade is up to you when you want to fit it in.
Items
Starting Items
Branch x 4
Tango
Observer Wards
I dont have the time to search for a map right now to show you where to place Observer Wards, so either you will have to look them up somewhere or maybe someone here can help you out on that. But it is your responsibility. It's your responsibility all game long. But hopefully someone else helps you buying them along the way. Early game you want them up high over where the Runes spawn.
As far as the branches go, they are not just there to help your stats early game. These are part of other things you will be building later on.
The Observer Wards last 6 minutes. Sometimes you will have to put off buying them to buy something for yourself, like the boots of travel. (See below) But you should have enough gold to complete the magic Wand and buy more observer Wards before the 6 minutes is up. Or close enough to it.
[/b]Items you are building[/b]
Magic Wand (3 of the branches are going to this)
See the last 2 part to buy here
Boots of Speed
(It's up to you what you later build with the boots. I recommend phase boots or power treads. But either way this upgrade comes much later)
Mekansm (
last branch is going towards this. Buy Headdress first.)
Magic Wand will absorb enemies magic use for you to use to refill your heath and mana. Very Handy early game.
Mekansm will boost not only your health, but any teammates health around you. Very handy and a great boost to your teammates in team fights. Time it's use well. Dont just use it when everybody is only missing 10% of their health.
Next you are either going to upgrade your boots to Phase Boots or Power Treads, or start building your Aghanims Scepter.
http://www.dota2wiki.com/wiki/Aghanim's_Scepter
The first part of the Scepter is important because it will give you a huge boost to both your health and mana. That's the Point Booster. Buy that first when you are building your Scepter. It's 1200 gold and has to be bought at the Secret Shop. All the other parts are 1000 gold and can be bought at the fountain.
How you play Lich
You should be playing the hard lane with Lich no matter which side you are on. Heres why.
Early game you are going to help your team out tremendously with Lich by stunting the growth of the other team. That's what the Sacrifice is for. Right from the beginning of the game start using Sacrifice on your creeps. Use it every time it comes back up. Preferable on the melee creeps since they give your opponents more XP. Together with Denying Creeps (click A then attack your own creeps right before they are about to die) you will steal a lot of XP from the opponents in your lane.
Now the reason you are going to play the hard lane (Bottom for Dire, Top for Radiant) is because of your sacrifice ability it will not be the hard lane anymore. Between using deny and sacrifice you are going to pull the creep line (where creeps meet up to fight) from the opponents side and move it back to your side. Try to keep it balanced right about the river. Any further back and the your tower will attack the creeps and mess everything up. Your tower will obliterate the opponents creeps and that will end up moving the creep line back towards the opponents tower. It's a balancing act you will have to learn. If the line is getting moved back to your tower start using A + attack on your own creeps to balance out the fight. Takes some getting used to but you can see how this helps your team out. Reduces XP that your opponent gets early game plus it takes what is normally a hard lane for your team to play and moves it back to a safer spot that will reduce the chance of getting ganked.
Harass the opponent heroes with Frostblast when you can, but be careful and dont get caught out. If they kill you then you aren't getting XP, you are losing gold, and you aren't in lane to keep them from getting XP.
Play this well and you and your in-lane teammate will reach level 6 way before your opponent. Now they're fucked. You both have your ultimates and they are stuck at level 5 or even lower and you are ready to take them out and their isn't much they can do to stop the two of you if you are working together right.
You will have to feel your way through the mid to late game yourself. Try not to be on the opposite side of the enemies in a teamfight. I know it feels like you are flanking them and helping, but really you are too soft to survive on that side. Play from behind or alongside your teammates. Spam Frost Armor on them. It;s mana cost is cheap enough to keep spamming it.
I'm sure I missed some things here so hopefully some other people will pitch in on what I missed or got wrong.