Blade Vortex Build

[Darkkin]

I'm really new and have decided to do a blade vortex build with my shadow, just curious which passives affect it, it is a spell but it deals physical damage, so do I increase physical damage % or spell damage %

Cheers,
Tim

[Awesome!]

Blade Vortex's base damage is boosted by Physical Damage, Spell Damage, Area Damage, and Damage.
http://pathofexile.gamepedia.com/Blade_Vortex