Wraith band

It will give you extra agility (damage, armor and speed)


Tango

For when you get harrassed/attacked early game

Power Treads (Agility)
More attack speed, movement speed and extra damage.



Vanguard
More health and regen.



Sange and Yasha
Basically gives you everything, strength, agility, speed and damage.



Aghanim's Scepter
Makes your ulti waaaaaaay better, high attack speed and damage and it is now able to damage ancients!

Helm of the dominator

Gives you life steal, damage and armor, very usefull end game when you have high attack speed and high damage.



Mjollnir
Exreme attack speed, high damage and usefull chain attack while farming.



Eye of skadi (only if enemies are fast or you need health/mana)
Slows enemies down, gives 25+ to all your attributes, 200hp and 150 mana.