Benice92 is playing this deck, and many more at
Benice92'S HEARTHSTONE LIVE STREAM
A detailed guide follows after 100 upvotes.
Benice92 played nearly 100 games of Khadgar Mage on his stream in the last two days. He tried different versions of this deck and got this build: Kalecgos is not good, Alex sometimes helps against Aggro, owl is for edwin. He was inspired by @Apxvoid
Many thanks to @tommy_wave for the great video: