I

Rasante Kugeln

Good item so you can deny something on lane, you can sell it later for extra slot

I

Veredeln

Mystische Erweiterung

Its easier to stun enemy heroes with more range, right?

I

Zusätzliche Aufladung

Use your 1st to clear waves faster or do more dmg

II

Wappen des Zauberers

Good item that gives you great buffs/resist, you can sell it in late for extra slot

II

Arkane Verstärkung

Great item, gives you extra stamina that is necessary for this hero, use it more for the ability buffs

II

Aktiv

Fluch der Langsamkeit

Use it to stun enemy heroes with your 3rd

IV

Aktiv

Wirbelnetz

This is where the fun begins, use it with your 3rd

III

Aktiv

Kultopfer

Great buffs, if you don't have extra slot you can sell high velocity or just skip it

III

Schnelle Aufladung

Extra charge for your 1st

III

Panzerschreck

Awesome item for dmg

III

Trophäensammler

Could be used over Cultist Sacrifice, if you want more ms and passive souls, spell range

II

Heilungsfluch

Good early anti-heal

IV

Magiebrand

Great anti-heal + bonus dmg

IV

Transzendente Abklingzeit

For Vortex Web cooldown

III

Größere Erweiterung

You can skip this and buy Echo Shard if you want

IV

Veredeln

Aktiv

Echo-Splitter

More stuns, more fun

IV

Eskalierende Bloßstellung

More dmg from your Vortex Combo

IV

Grenzenlose Magiekraft

Last priority, good spirit buff

IV

Aktiv

Auffrischer

For your ult, support role

IV

Schriftrolle des Blitzes

Buy this with refresher

IV

Aktiv

Göttliche Barriere

For support role, against heroes such as Bebop, Pocket

III

Gegenzauber

In right hands you can dodge everything

III

Aktiv

Schwächungs­entferner

Against heroes such as Infernus, Bebop

IV

Aktiv

Ätherischer Schleier

Good late item, cause you don't have too much hp

I

Monster-Kugeln

If you need to clear waves or farm faster

II

Aktiv

Splitterkugel

Could be used as dmg booster at early game

II

Aktiv

Schutzwache

For support role (when cast on your mate, cooldown is reduced by half)

II

Mystische Verlangsamung

Could be good for your 1st

II

Unterdrückung

Against M1 heroes like Haze, Wraith

III

Aktiv

Niederschlag

If you can't stun enemy's with your ult or just don't want to waste it

III

Aktiv

Verfall

Take if enemy have tanky heroes

III

Aktiv

Welle der Verstummung

Early 'curse'

IV

Aktiv

Fluch

Against annoying heroes such as Lash, Dynamo, Haze