Viper

Viper is awesome hero for new players,of course if develop him on right way.Let's start.
Powers:

1. Nethertoxin(2)
2. Poison attack(1)
3. Nethertoxin
4. Corrosive skin
5. Nethertoxin
6. Viper strike(ulty(4))
7. Nethertoxin
8. Corrosive skin
9. Corrosive skin
10. Corrosive skin
11. Viper strike
12. Poison attack
13. Poison attack
14. Poison attack
15. +
16. Viper strike

The most important thing for Viper is health and attack speed.

Items:

Early game;

Stout sheld,tree,healving salve.

Mid early:

Power threads(on strenght)

Mid:

Vanguard

That is for early game.Next items depends on how much successful you start a game.

Preferred items:

Power threads

Vanguard

Lotar

Sange and Yasha

Assault curias

Heart of tarasque :)

Butterfly :)