Sven Item Build DotA
Starting-
Gauntlets of Ogre Strength
For a little boost in HP and last hitting power.
Ironwood Branch x3
For a little boost in HP, last hitting power, armor, mana, and buildup to Magic Wand.
Ancient Tango of Essifation x2
Regenerative purposes.
Healing Slave
Helps you stay in the lane if you just barely survive a gank or combo.
Sven Item Build DotA
Core-
Magic Wand
The most imba item in the game. The burst regeneration is useful in so many circumstances such as escaping a gank, turning the tide of a battle, or gaining back just enough mana to to kill somebody.
Boots of Speed
Everyone needs boots, and Sven is no exception. Low MS and melee attack range force Sven to grab boots early, even with Warcry.
Empty Bottle
Great item for rune whoring and ganking, very important to Sven.
Scroll of Town Portal
Not constantly carrying one of these around is the dumbest thing you can do.
Sven Item Build DotA
Core Extension-
Phase Boots or Treads
Treads gives the versatility of switching between stats when necessary and more damage, God's Strength only increases +stat damage not raw damage, but Phase Boots gives the invaluable ability to walk through creeps, take your pick.
Black King Bar
The stats are great and the avatar ability is insane. Without BKB you run the risk of being chain disabled, nuked to death, or simply having your buffs purged off with a diffusual blade. Get BKB right after core.
Kelen's Dagger
Blink is invaluable, seriously consider getting this item if your team lacks initiation.
Mask of Death
Who doesn't want to steal life? It upgrades into either MoM or Satanic, either of which are very good for Sven.
Sven Item Build DotA
Late Game Extension-
Mask of Madness
Great item because it gives Sven a steroids skill. If you are carrying MoM should be your choice because of the huge IAS it gives, but if you are tanking Satanic should be your choice.
Satanic
Lifesteal and Strength, great item for Sven if the game drags on forever.
Helm of the Dominator Mini Guide
Assault Cuirass
Lowers enemy armor and gives IAS, sexy item, not sexy cost. Get this item when the game has dragged on so long you shouldn't even still be playing it.